Type.h revision 949d2c031f173ec539d1aa667bba503fda7fb763
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/AST/NestedNameSpecifier.h" 22#include "clang/AST/TemplateName.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/type_traits.h" 25#include "llvm/ADT/APSInt.h" 26#include "llvm/ADT/FoldingSet.h" 27#include "llvm/ADT/PointerIntPair.h" 28#include "llvm/ADT/PointerUnion.h" 29 30using llvm::isa; 31using llvm::cast; 32using llvm::cast_or_null; 33using llvm::dyn_cast; 34using llvm::dyn_cast_or_null; 35namespace clang { 36 enum { 37 TypeAlignmentInBits = 3, 38 TypeAlignment = 1 << TypeAlignmentInBits 39 }; 40 class Type; 41 class ExtQuals; 42 class QualType; 43} 44 45namespace llvm { 46 template <typename T> 47 class PointerLikeTypeTraits; 48 template<> 49 class PointerLikeTypeTraits< ::clang::Type*> { 50 public: 51 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 52 static inline ::clang::Type *getFromVoidPointer(void *P) { 53 return static_cast< ::clang::Type*>(P); 54 } 55 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 56 }; 57 template<> 58 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 59 public: 60 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 61 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 62 return static_cast< ::clang::ExtQuals*>(P); 63 } 64 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 65 }; 66 67 template <> 68 struct isPodLike<clang::QualType> { static const bool value = true; }; 69} 70 71namespace clang { 72 class ASTContext; 73 class TypedefDecl; 74 class TemplateDecl; 75 class TemplateTypeParmDecl; 76 class NonTypeTemplateParmDecl; 77 class TemplateTemplateParmDecl; 78 class TagDecl; 79 class RecordDecl; 80 class CXXRecordDecl; 81 class EnumDecl; 82 class FieldDecl; 83 class ObjCInterfaceDecl; 84 class ObjCProtocolDecl; 85 class ObjCMethodDecl; 86 class UnresolvedUsingTypenameDecl; 87 class Expr; 88 class Stmt; 89 class SourceLocation; 90 class StmtIteratorBase; 91 class TemplateArgument; 92 class TemplateArgumentLoc; 93 class TemplateArgumentListInfo; 94 class Type; 95 class ElaboratedType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 2, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 275 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 276 277 operator bool() const { return hasQualifiers(); } 278 279 Qualifiers &operator+=(Qualifiers R) { 280 addQualifiers(R); 281 return *this; 282 } 283 284 // Union two qualifier sets. If an enumerated qualifier appears 285 // in both sets, use the one from the right. 286 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 287 L += R; 288 return L; 289 } 290 291 std::string getAsString() const; 292 std::string getAsString(const PrintingPolicy &Policy) const { 293 std::string Buffer; 294 getAsStringInternal(Buffer, Policy); 295 return Buffer; 296 } 297 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 298 299 void Profile(llvm::FoldingSetNodeID &ID) const { 300 ID.AddInteger(Mask); 301 } 302 303private: 304 305 // bits: |0 1 2|3 .. 4|5 .. 31| 306 // |C R V|GCAttr|AddrSpace| 307 uint32_t Mask; 308 309 static const uint32_t GCAttrMask = 0x18; 310 static const uint32_t GCAttrShift = 3; 311 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 312 static const uint32_t AddressSpaceShift = 5; 313}; 314 315 316/// ExtQuals - We can encode up to three bits in the low bits of a 317/// type pointer, but there are many more type qualifiers that we want 318/// to be able to apply to an arbitrary type. Therefore we have this 319/// struct, intended to be heap-allocated and used by QualType to 320/// store qualifiers. 321/// 322/// The current design tags the 'const' and 'restrict' qualifiers in 323/// two low bits on the QualType pointer; a third bit records whether 324/// the pointer is an ExtQuals node. 'const' was chosen because it is 325/// orders of magnitude more common than the other two qualifiers, in 326/// both library and user code. It's relatively rare to see 327/// 'restrict' in user code, but many standard C headers are saturated 328/// with 'restrict' declarations, so that representing them efficiently 329/// is a critical goal of this representation. 330class ExtQuals : public llvm::FoldingSetNode { 331 // NOTE: changing the fast qualifiers should be straightforward as 332 // long as you don't make 'const' non-fast. 333 // 1. Qualifiers: 334 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 335 // Fast qualifiers must occupy the low-order bits. 336 // b) Update Qualifiers::FastWidth and FastMask. 337 // 2. QualType: 338 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 339 // b) Update remove{Volatile,Restrict}, defined near the end of 340 // this header. 341 // 3. ASTContext: 342 // a) Update get{Volatile,Restrict}Type. 343 344 /// Context - the context to which this set belongs. We save this 345 /// here so that QualifierCollector can use it to reapply extended 346 /// qualifiers to an arbitrary type without requiring a context to 347 /// be pushed through every single API dealing with qualifiers. 348 ASTContext& Context; 349 350 /// BaseType - the underlying type that this qualifies 351 const Type *BaseType; 352 353 /// Quals - the immutable set of qualifiers applied by this 354 /// node; always contains extended qualifiers. 355 Qualifiers Quals; 356 357public: 358 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 359 : Context(Context), BaseType(Base), Quals(Quals) 360 { 361 assert(Quals.hasNonFastQualifiers() 362 && "ExtQuals created with no fast qualifiers"); 363 assert(!Quals.hasFastQualifiers() 364 && "ExtQuals created with fast qualifiers"); 365 } 366 367 Qualifiers getQualifiers() const { return Quals; } 368 369 bool hasVolatile() const { return Quals.hasVolatile(); } 370 371 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 372 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 373 374 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 375 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 376 377 const Type *getBaseType() const { return BaseType; } 378 379 ASTContext &getContext() const { return Context; } 380 381public: 382 void Profile(llvm::FoldingSetNodeID &ID) const { 383 Profile(ID, getBaseType(), Quals); 384 } 385 static void Profile(llvm::FoldingSetNodeID &ID, 386 const Type *BaseType, 387 Qualifiers Quals) { 388 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 389 ID.AddPointer(BaseType); 390 Quals.Profile(ID); 391 } 392}; 393 394/// CallingConv - Specifies the calling convention that a function uses. 395enum CallingConv { 396 CC_Default, 397 CC_C, // __attribute__((cdecl)) 398 CC_X86StdCall, // __attribute__((stdcall)) 399 CC_X86FastCall, // __attribute__((fastcall)) 400 CC_X86ThisCall // __attribute__((thiscall)) 401}; 402 403 404/// QualType - For efficiency, we don't store CV-qualified types as nodes on 405/// their own: instead each reference to a type stores the qualifiers. This 406/// greatly reduces the number of nodes we need to allocate for types (for 407/// example we only need one for 'int', 'const int', 'volatile int', 408/// 'const volatile int', etc). 409/// 410/// As an added efficiency bonus, instead of making this a pair, we 411/// just store the two bits we care about in the low bits of the 412/// pointer. To handle the packing/unpacking, we make QualType be a 413/// simple wrapper class that acts like a smart pointer. A third bit 414/// indicates whether there are extended qualifiers present, in which 415/// case the pointer points to a special structure. 416class QualType { 417 // Thankfully, these are efficiently composable. 418 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 419 Qualifiers::FastWidth> Value; 420 421 const ExtQuals *getExtQualsUnsafe() const { 422 return Value.getPointer().get<const ExtQuals*>(); 423 } 424 425 const Type *getTypePtrUnsafe() const { 426 return Value.getPointer().get<const Type*>(); 427 } 428 429 QualType getUnqualifiedTypeSlow() const; 430 431 friend class QualifierCollector; 432public: 433 QualType() {} 434 435 QualType(const Type *Ptr, unsigned Quals) 436 : Value(Ptr, Quals) {} 437 QualType(const ExtQuals *Ptr, unsigned Quals) 438 : Value(Ptr, Quals) {} 439 440 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 441 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 442 443 /// Retrieves a pointer to the underlying (unqualified) type. 444 /// This should really return a const Type, but it's not worth 445 /// changing all the users right now. 446 Type *getTypePtr() const { 447 if (hasLocalNonFastQualifiers()) 448 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 449 return const_cast<Type*>(getTypePtrUnsafe()); 450 } 451 452 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 453 static QualType getFromOpaquePtr(void *Ptr) { 454 QualType T; 455 T.Value.setFromOpaqueValue(Ptr); 456 return T; 457 } 458 459 Type &operator*() const { 460 return *getTypePtr(); 461 } 462 463 Type *operator->() const { 464 return getTypePtr(); 465 } 466 467 bool isCanonical() const; 468 bool isCanonicalAsParam() const; 469 470 /// isNull - Return true if this QualType doesn't point to a type yet. 471 bool isNull() const { 472 return Value.getPointer().isNull(); 473 } 474 475 /// \brief Determine whether this particular QualType instance has the 476 /// "const" qualifier set, without looking through typedefs that may have 477 /// added "const" at a different level. 478 bool isLocalConstQualified() const { 479 return (getLocalFastQualifiers() & Qualifiers::Const); 480 } 481 482 /// \brief Determine whether this type is const-qualified. 483 bool isConstQualified() const; 484 485 /// \brief Determine whether this particular QualType instance has the 486 /// "restrict" qualifier set, without looking through typedefs that may have 487 /// added "restrict" at a different level. 488 bool isLocalRestrictQualified() const { 489 return (getLocalFastQualifiers() & Qualifiers::Restrict); 490 } 491 492 /// \brief Determine whether this type is restrict-qualified. 493 bool isRestrictQualified() const; 494 495 /// \brief Determine whether this particular QualType instance has the 496 /// "volatile" qualifier set, without looking through typedefs that may have 497 /// added "volatile" at a different level. 498 bool isLocalVolatileQualified() const { 499 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 500 } 501 502 /// \brief Determine whether this type is volatile-qualified. 503 bool isVolatileQualified() const; 504 505 /// \brief Determine whether this particular QualType instance has any 506 /// qualifiers, without looking through any typedefs that might add 507 /// qualifiers at a different level. 508 bool hasLocalQualifiers() const { 509 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 510 } 511 512 /// \brief Determine whether this type has any qualifiers. 513 bool hasQualifiers() const; 514 515 /// \brief Determine whether this particular QualType instance has any 516 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 517 /// instance. 518 bool hasLocalNonFastQualifiers() const { 519 return Value.getPointer().is<const ExtQuals*>(); 520 } 521 522 /// \brief Retrieve the set of qualifiers local to this particular QualType 523 /// instance, not including any qualifiers acquired through typedefs or 524 /// other sugar. 525 Qualifiers getLocalQualifiers() const { 526 Qualifiers Quals; 527 if (hasLocalNonFastQualifiers()) 528 Quals = getExtQualsUnsafe()->getQualifiers(); 529 Quals.addFastQualifiers(getLocalFastQualifiers()); 530 return Quals; 531 } 532 533 /// \brief Retrieve the set of qualifiers applied to this type. 534 Qualifiers getQualifiers() const; 535 536 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 537 /// local to this particular QualType instance, not including any qualifiers 538 /// acquired through typedefs or other sugar. 539 unsigned getLocalCVRQualifiers() const { 540 unsigned CVR = getLocalFastQualifiers(); 541 if (isLocalVolatileQualified()) 542 CVR |= Qualifiers::Volatile; 543 return CVR; 544 } 545 546 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 547 /// applied to this type. 548 unsigned getCVRQualifiers() const; 549 550 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 551 /// applied to this type, looking through any number of unqualified array 552 /// types to their element types' qualifiers. 553 unsigned getCVRQualifiersThroughArrayTypes() const; 554 555 bool isConstant(ASTContext& Ctx) const { 556 return QualType::isConstant(*this, Ctx); 557 } 558 559 // Don't promise in the API that anything besides 'const' can be 560 // easily added. 561 562 /// addConst - add the specified type qualifier to this QualType. 563 void addConst() { 564 addFastQualifiers(Qualifiers::Const); 565 } 566 QualType withConst() const { 567 return withFastQualifiers(Qualifiers::Const); 568 } 569 570 void addFastQualifiers(unsigned TQs) { 571 assert(!(TQs & ~Qualifiers::FastMask) 572 && "non-fast qualifier bits set in mask!"); 573 Value.setInt(Value.getInt() | TQs); 574 } 575 576 // FIXME: The remove* functions are semantically broken, because they might 577 // not remove a qualifier stored on a typedef. Most of the with* functions 578 // have the same problem. 579 void removeConst(); 580 void removeVolatile(); 581 void removeRestrict(); 582 void removeCVRQualifiers(unsigned Mask); 583 584 void removeFastQualifiers() { Value.setInt(0); } 585 void removeFastQualifiers(unsigned Mask) { 586 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 587 Value.setInt(Value.getInt() & ~Mask); 588 } 589 590 // Creates a type with the given qualifiers in addition to any 591 // qualifiers already on this type. 592 QualType withFastQualifiers(unsigned TQs) const { 593 QualType T = *this; 594 T.addFastQualifiers(TQs); 595 return T; 596 } 597 598 // Creates a type with exactly the given fast qualifiers, removing 599 // any existing fast qualifiers. 600 QualType withExactFastQualifiers(unsigned TQs) const { 601 return withoutFastQualifiers().withFastQualifiers(TQs); 602 } 603 604 // Removes fast qualifiers, but leaves any extended qualifiers in place. 605 QualType withoutFastQualifiers() const { 606 QualType T = *this; 607 T.removeFastQualifiers(); 608 return T; 609 } 610 611 /// \brief Return this type with all of the instance-specific qualifiers 612 /// removed, but without removing any qualifiers that may have been applied 613 /// through typedefs. 614 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 615 616 /// \brief Return the unqualified form of the given type, which might be 617 /// desugared to eliminate qualifiers introduced via typedefs. 618 QualType getUnqualifiedType() const { 619 QualType T = getLocalUnqualifiedType(); 620 if (!T.hasQualifiers()) 621 return T; 622 623 return getUnqualifiedTypeSlow(); 624 } 625 626 bool isMoreQualifiedThan(QualType Other) const; 627 bool isAtLeastAsQualifiedAs(QualType Other) const; 628 QualType getNonReferenceType() const; 629 630 /// getDesugaredType - Return the specified type with any "sugar" removed from 631 /// the type. This takes off typedefs, typeof's etc. If the outer level of 632 /// the type is already concrete, it returns it unmodified. This is similar 633 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 634 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 635 /// concrete. 636 /// 637 /// Qualifiers are left in place. 638 QualType getDesugaredType() const { 639 return QualType::getDesugaredType(*this); 640 } 641 642 /// operator==/!= - Indicate whether the specified types and qualifiers are 643 /// identical. 644 friend bool operator==(const QualType &LHS, const QualType &RHS) { 645 return LHS.Value == RHS.Value; 646 } 647 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 648 return LHS.Value != RHS.Value; 649 } 650 std::string getAsString() const; 651 652 std::string getAsString(const PrintingPolicy &Policy) const { 653 std::string S; 654 getAsStringInternal(S, Policy); 655 return S; 656 } 657 void getAsStringInternal(std::string &Str, 658 const PrintingPolicy &Policy) const; 659 660 void dump(const char *s) const; 661 void dump() const; 662 663 void Profile(llvm::FoldingSetNodeID &ID) const { 664 ID.AddPointer(getAsOpaquePtr()); 665 } 666 667 /// getAddressSpace - Return the address space of this type. 668 inline unsigned getAddressSpace() const; 669 670 /// GCAttrTypesAttr - Returns gc attribute of this type. 671 inline Qualifiers::GC getObjCGCAttr() const; 672 673 /// isObjCGCWeak true when Type is objc's weak. 674 bool isObjCGCWeak() const { 675 return getObjCGCAttr() == Qualifiers::Weak; 676 } 677 678 /// isObjCGCStrong true when Type is objc's strong. 679 bool isObjCGCStrong() const { 680 return getObjCGCAttr() == Qualifiers::Strong; 681 } 682 683private: 684 // These methods are implemented in a separate translation unit; 685 // "static"-ize them to avoid creating temporary QualTypes in the 686 // caller. 687 static bool isConstant(QualType T, ASTContext& Ctx); 688 static QualType getDesugaredType(QualType T); 689}; 690 691} // end clang. 692 693namespace llvm { 694/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 695/// to a specific Type class. 696template<> struct simplify_type<const ::clang::QualType> { 697 typedef ::clang::Type* SimpleType; 698 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 699 return Val.getTypePtr(); 700 } 701}; 702template<> struct simplify_type< ::clang::QualType> 703 : public simplify_type<const ::clang::QualType> {}; 704 705// Teach SmallPtrSet that QualType is "basically a pointer". 706template<> 707class PointerLikeTypeTraits<clang::QualType> { 708public: 709 static inline void *getAsVoidPointer(clang::QualType P) { 710 return P.getAsOpaquePtr(); 711 } 712 static inline clang::QualType getFromVoidPointer(void *P) { 713 return clang::QualType::getFromOpaquePtr(P); 714 } 715 // Various qualifiers go in low bits. 716 enum { NumLowBitsAvailable = 0 }; 717}; 718 719} // end namespace llvm 720 721namespace clang { 722 723/// Type - This is the base class of the type hierarchy. A central concept 724/// with types is that each type always has a canonical type. A canonical type 725/// is the type with any typedef names stripped out of it or the types it 726/// references. For example, consider: 727/// 728/// typedef int foo; 729/// typedef foo* bar; 730/// 'int *' 'foo *' 'bar' 731/// 732/// There will be a Type object created for 'int'. Since int is canonical, its 733/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 734/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 735/// there is a PointerType that represents 'int*', which, like 'int', is 736/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 737/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 738/// is also 'int*'. 739/// 740/// Non-canonical types are useful for emitting diagnostics, without losing 741/// information about typedefs being used. Canonical types are useful for type 742/// comparisons (they allow by-pointer equality tests) and useful for reasoning 743/// about whether something has a particular form (e.g. is a function type), 744/// because they implicitly, recursively, strip all typedefs out of a type. 745/// 746/// Types, once created, are immutable. 747/// 748class Type { 749public: 750 enum TypeClass { 751#define TYPE(Class, Base) Class, 752#define LAST_TYPE(Class) TypeLast = Class, 753#define ABSTRACT_TYPE(Class, Base) 754#include "clang/AST/TypeNodes.def" 755 TagFirst = Record, TagLast = Enum 756 }; 757 758private: 759 Type(const Type&); // DO NOT IMPLEMENT. 760 void operator=(const Type&); // DO NOT IMPLEMENT. 761 762 QualType CanonicalType; 763 764 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 765 unsigned TC : 8; 766 767 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 768 /// Note that this should stay at the end of the ivars for Type so that 769 /// subclasses can pack their bitfields into the same word. 770 bool Dependent : 1; 771 772 /// \brief Whether the linkage of this type is already known. 773 mutable bool LinkageKnown : 1; 774 775 /// \brief Linkage of this type. 776 mutable unsigned CachedLinkage : 2; 777 778protected: 779 /// \brief Compute the linkage of this type. 780 virtual Linkage getLinkageImpl() const; 781 782 enum { BitsRemainingInType = 20 }; 783 784 // silence VC++ warning C4355: 'this' : used in base member initializer list 785 Type *this_() { return this; } 786 Type(TypeClass tc, QualType Canonical, bool dependent) 787 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 788 TC(tc), Dependent(dependent), LinkageKnown(false), 789 CachedLinkage(NoLinkage) {} 790 virtual ~Type() {} 791 virtual void Destroy(ASTContext& C); 792 friend class ASTContext; 793 794public: 795 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 796 797 bool isCanonicalUnqualified() const { 798 return CanonicalType.getTypePtr() == this; 799 } 800 801 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 802 /// object types, function types, and incomplete types. 803 804 /// \brief Determines whether the type describes an object in memory. 805 /// 806 /// Note that this definition of object type corresponds to the C++ 807 /// definition of object type, which includes incomplete types, as 808 /// opposed to the C definition (which does not include incomplete 809 /// types). 810 bool isObjectType() const; 811 812 /// isIncompleteType - Return true if this is an incomplete type. 813 /// A type that can describe objects, but which lacks information needed to 814 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 815 /// routine will need to determine if the size is actually required. 816 bool isIncompleteType() const; 817 818 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 819 /// type, in other words, not a function type. 820 bool isIncompleteOrObjectType() const { 821 return !isFunctionType(); 822 } 823 824 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 825 bool isPODType() const; 826 827 /// isLiteralType - Return true if this is a literal type 828 /// (C++0x [basic.types]p10) 829 bool isLiteralType() const; 830 831 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 832 /// types that have a non-constant expression. This does not include "[]". 833 bool isVariablyModifiedType() const; 834 835 /// Helper methods to distinguish type categories. All type predicates 836 /// operate on the canonical type, ignoring typedefs and qualifiers. 837 838 /// isSpecificBuiltinType - Test for a particular builtin type. 839 bool isSpecificBuiltinType(unsigned K) const; 840 841 /// isIntegerType() does *not* include complex integers (a GCC extension). 842 /// isComplexIntegerType() can be used to test for complex integers. 843 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 844 bool isEnumeralType() const; 845 bool isBooleanType() const; 846 bool isCharType() const; 847 bool isWideCharType() const; 848 bool isAnyCharacterType() const; 849 bool isIntegralType() const; 850 851 /// Floating point categories. 852 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 853 /// isComplexType() does *not* include complex integers (a GCC extension). 854 /// isComplexIntegerType() can be used to test for complex integers. 855 bool isComplexType() const; // C99 6.2.5p11 (complex) 856 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 857 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 858 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 859 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 860 bool isVoidType() const; // C99 6.2.5p19 861 bool isDerivedType() const; // C99 6.2.5p20 862 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 863 bool isAggregateType() const; 864 865 // Type Predicates: Check to see if this type is structurally the specified 866 // type, ignoring typedefs and qualifiers. 867 bool isFunctionType() const; 868 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 869 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 870 bool isPointerType() const; 871 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 872 bool isBlockPointerType() const; 873 bool isVoidPointerType() const; 874 bool isReferenceType() const; 875 bool isLValueReferenceType() const; 876 bool isRValueReferenceType() const; 877 bool isFunctionPointerType() const; 878 bool isMemberPointerType() const; 879 bool isMemberFunctionPointerType() const; 880 bool isArrayType() const; 881 bool isConstantArrayType() const; 882 bool isIncompleteArrayType() const; 883 bool isVariableArrayType() const; 884 bool isDependentSizedArrayType() const; 885 bool isRecordType() const; 886 bool isClassType() const; 887 bool isStructureType() const; 888 bool isStructureOrClassType() const; 889 bool isUnionType() const; 890 bool isComplexIntegerType() const; // GCC _Complex integer type. 891 bool isVectorType() const; // GCC vector type. 892 bool isExtVectorType() const; // Extended vector type. 893 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 894 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 895 // for the common case. 896 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 897 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 898 bool isObjCQualifiedIdType() const; // id<foo> 899 bool isObjCQualifiedClassType() const; // Class<foo> 900 bool isObjCIdType() const; // id 901 bool isObjCClassType() const; // Class 902 bool isObjCSelType() const; // Class 903 bool isObjCBuiltinType() const; // 'id' or 'Class' 904 bool isTemplateTypeParmType() const; // C++ template type parameter 905 bool isNullPtrType() const; // C++0x nullptr_t 906 907 /// isDependentType - Whether this type is a dependent type, meaning 908 /// that its definition somehow depends on a template parameter 909 /// (C++ [temp.dep.type]). 910 bool isDependentType() const { return Dependent; } 911 bool isOverloadableType() const; 912 913 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 914 bool isElaboratedTypeSpecifier() const; 915 916 /// hasPointerRepresentation - Whether this type is represented 917 /// natively as a pointer; this includes pointers, references, block 918 /// pointers, and Objective-C interface, qualified id, and qualified 919 /// interface types, as well as nullptr_t. 920 bool hasPointerRepresentation() const; 921 922 /// hasObjCPointerRepresentation - Whether this type can represent 923 /// an objective pointer type for the purpose of GC'ability 924 bool hasObjCPointerRepresentation() const; 925 926 // Type Checking Functions: Check to see if this type is structurally the 927 // specified type, ignoring typedefs and qualifiers, and return a pointer to 928 // the best type we can. 929 const RecordType *getAsStructureType() const; 930 /// NOTE: getAs*ArrayType are methods on ASTContext. 931 const RecordType *getAsUnionType() const; 932 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 933 // The following is a convenience method that returns an ObjCObjectPointerType 934 // for object declared using an interface. 935 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 936 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 937 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 938 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 939 940 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 941 /// because the type is a RecordType or because it is the injected-class-name 942 /// type of a class template or class template partial specialization. 943 CXXRecordDecl *getAsCXXRecordDecl() const; 944 945 // Member-template getAs<specific type>'. This scheme will eventually 946 // replace the specific getAsXXXX methods above. 947 // 948 // There are some specializations of this member template listed 949 // immediately following this class. 950 template <typename T> const T *getAs() const; 951 952 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 953 /// element type of the array, potentially with type qualifiers missing. 954 /// This method should never be used when type qualifiers are meaningful. 955 const Type *getArrayElementTypeNoTypeQual() const; 956 957 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 958 /// pointer, this returns the respective pointee. 959 QualType getPointeeType() const; 960 961 /// getUnqualifiedDesugaredType() - Return the specified type with 962 /// any "sugar" removed from the type, removing any typedefs, 963 /// typeofs, etc., as well as any qualifiers. 964 const Type *getUnqualifiedDesugaredType() const; 965 966 /// More type predicates useful for type checking/promotion 967 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 968 969 /// isSignedIntegerType - Return true if this is an integer type that is 970 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 971 /// an enum decl which has a signed representation, or a vector of signed 972 /// integer element type. 973 bool isSignedIntegerType() const; 974 975 /// isUnsignedIntegerType - Return true if this is an integer type that is 976 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 977 /// decl which has an unsigned representation, or a vector of unsigned integer 978 /// element type. 979 bool isUnsignedIntegerType() const; 980 981 /// isConstantSizeType - Return true if this is not a variable sized type, 982 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 983 /// incomplete types. 984 bool isConstantSizeType() const; 985 986 /// isSpecifierType - Returns true if this type can be represented by some 987 /// set of type specifiers. 988 bool isSpecifierType() const; 989 990 /// \brief Determine the linkage of this type. 991 Linkage getLinkage() const; 992 993 /// \brief Note that the linkage is no longer known. 994 void ClearLinkageCache(); 995 996 const char *getTypeClassName() const; 997 998 QualType getCanonicalTypeInternal() const { 999 return CanonicalType; 1000 } 1001 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1002 void dump() const; 1003 static bool classof(const Type *) { return true; } 1004}; 1005 1006template <> inline const TypedefType *Type::getAs() const { 1007 return dyn_cast<TypedefType>(this); 1008} 1009 1010// We can do canonical leaf types faster, because we don't have to 1011// worry about preserving child type decoration. 1012#define TYPE(Class, Base) 1013#define LEAF_TYPE(Class) \ 1014template <> inline const Class##Type *Type::getAs() const { \ 1015 return dyn_cast<Class##Type>(CanonicalType); \ 1016} 1017#include "clang/AST/TypeNodes.def" 1018 1019 1020/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1021/// types are always canonical and have a literal name field. 1022class BuiltinType : public Type { 1023public: 1024 enum Kind { 1025 Void, 1026 1027 Bool, // This is bool and/or _Bool. 1028 Char_U, // This is 'char' for targets where char is unsigned. 1029 UChar, // This is explicitly qualified unsigned char. 1030 Char16, // This is 'char16_t' for C++. 1031 Char32, // This is 'char32_t' for C++. 1032 UShort, 1033 UInt, 1034 ULong, 1035 ULongLong, 1036 UInt128, // __uint128_t 1037 1038 Char_S, // This is 'char' for targets where char is signed. 1039 SChar, // This is explicitly qualified signed char. 1040 WChar, // This is 'wchar_t' for C++. 1041 Short, 1042 Int, 1043 Long, 1044 LongLong, 1045 Int128, // __int128_t 1046 1047 Float, Double, LongDouble, 1048 1049 NullPtr, // This is the type of C++0x 'nullptr'. 1050 1051 Overload, // This represents the type of an overloaded function declaration. 1052 Dependent, // This represents the type of a type-dependent expression. 1053 1054 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1055 // that has not been deduced yet. 1056 1057 /// The primitive Objective C 'id' type. The type pointed to by the 1058 /// user-visible 'id' type. Only ever shows up in an AST as the base 1059 /// type of an ObjCObjectType. 1060 ObjCId, 1061 1062 /// The primitive Objective C 'Class' type. The type pointed to by the 1063 /// user-visible 'Class' type. Only ever shows up in an AST as the 1064 /// base type of an ObjCObjectType. 1065 ObjCClass, 1066 1067 ObjCSel // This represents the ObjC 'SEL' type. 1068 }; 1069private: 1070 Kind TypeKind; 1071 1072protected: 1073 virtual Linkage getLinkageImpl() const; 1074 1075public: 1076 BuiltinType(Kind K) 1077 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1078 TypeKind(K) {} 1079 1080 Kind getKind() const { return TypeKind; } 1081 const char *getName(const LangOptions &LO) const; 1082 1083 bool isSugared() const { return false; } 1084 QualType desugar() const { return QualType(this, 0); } 1085 1086 bool isInteger() const { 1087 return TypeKind >= Bool && TypeKind <= Int128; 1088 } 1089 1090 bool isSignedInteger() const { 1091 return TypeKind >= Char_S && TypeKind <= Int128; 1092 } 1093 1094 bool isUnsignedInteger() const { 1095 return TypeKind >= Bool && TypeKind <= UInt128; 1096 } 1097 1098 bool isFloatingPoint() const { 1099 return TypeKind >= Float && TypeKind <= LongDouble; 1100 } 1101 1102 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1103 static bool classof(const BuiltinType *) { return true; } 1104}; 1105 1106/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1107/// types (_Complex float etc) as well as the GCC integer complex extensions. 1108/// 1109class ComplexType : public Type, public llvm::FoldingSetNode { 1110 QualType ElementType; 1111 ComplexType(QualType Element, QualType CanonicalPtr) : 1112 Type(Complex, CanonicalPtr, Element->isDependentType()), 1113 ElementType(Element) { 1114 } 1115 friend class ASTContext; // ASTContext creates these. 1116 1117protected: 1118 virtual Linkage getLinkageImpl() const; 1119 1120public: 1121 QualType getElementType() const { return ElementType; } 1122 1123 bool isSugared() const { return false; } 1124 QualType desugar() const { return QualType(this, 0); } 1125 1126 void Profile(llvm::FoldingSetNodeID &ID) { 1127 Profile(ID, getElementType()); 1128 } 1129 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1130 ID.AddPointer(Element.getAsOpaquePtr()); 1131 } 1132 1133 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1134 static bool classof(const ComplexType *) { return true; } 1135}; 1136 1137/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1138/// 1139class PointerType : public Type, public llvm::FoldingSetNode { 1140 QualType PointeeType; 1141 1142 PointerType(QualType Pointee, QualType CanonicalPtr) : 1143 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1144 } 1145 friend class ASTContext; // ASTContext creates these. 1146 1147protected: 1148 virtual Linkage getLinkageImpl() const; 1149 1150public: 1151 1152 QualType getPointeeType() const { return PointeeType; } 1153 1154 bool isSugared() const { return false; } 1155 QualType desugar() const { return QualType(this, 0); } 1156 1157 void Profile(llvm::FoldingSetNodeID &ID) { 1158 Profile(ID, getPointeeType()); 1159 } 1160 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1161 ID.AddPointer(Pointee.getAsOpaquePtr()); 1162 } 1163 1164 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1165 static bool classof(const PointerType *) { return true; } 1166}; 1167 1168/// BlockPointerType - pointer to a block type. 1169/// This type is to represent types syntactically represented as 1170/// "void (^)(int)", etc. Pointee is required to always be a function type. 1171/// 1172class BlockPointerType : public Type, public llvm::FoldingSetNode { 1173 QualType PointeeType; // Block is some kind of pointer type 1174 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1175 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1176 PointeeType(Pointee) { 1177 } 1178 friend class ASTContext; // ASTContext creates these. 1179 1180protected: 1181 virtual Linkage getLinkageImpl() const; 1182 1183public: 1184 1185 // Get the pointee type. Pointee is required to always be a function type. 1186 QualType getPointeeType() const { return PointeeType; } 1187 1188 bool isSugared() const { return false; } 1189 QualType desugar() const { return QualType(this, 0); } 1190 1191 void Profile(llvm::FoldingSetNodeID &ID) { 1192 Profile(ID, getPointeeType()); 1193 } 1194 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1195 ID.AddPointer(Pointee.getAsOpaquePtr()); 1196 } 1197 1198 static bool classof(const Type *T) { 1199 return T->getTypeClass() == BlockPointer; 1200 } 1201 static bool classof(const BlockPointerType *) { return true; } 1202}; 1203 1204/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1205/// 1206class ReferenceType : public Type, public llvm::FoldingSetNode { 1207 QualType PointeeType; 1208 1209 /// True if the type was originally spelled with an lvalue sigil. 1210 /// This is never true of rvalue references but can also be false 1211 /// on lvalue references because of C++0x [dcl.typedef]p9, 1212 /// as follows: 1213 /// 1214 /// typedef int &ref; // lvalue, spelled lvalue 1215 /// typedef int &&rvref; // rvalue 1216 /// ref &a; // lvalue, inner ref, spelled lvalue 1217 /// ref &&a; // lvalue, inner ref 1218 /// rvref &a; // lvalue, inner ref, spelled lvalue 1219 /// rvref &&a; // rvalue, inner ref 1220 bool SpelledAsLValue; 1221 1222 /// True if the inner type is a reference type. This only happens 1223 /// in non-canonical forms. 1224 bool InnerRef; 1225 1226protected: 1227 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1228 bool SpelledAsLValue) : 1229 Type(tc, CanonicalRef, Referencee->isDependentType()), 1230 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1231 InnerRef(Referencee->isReferenceType()) { 1232 } 1233 1234 virtual Linkage getLinkageImpl() const; 1235 1236public: 1237 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1238 bool isInnerRef() const { return InnerRef; } 1239 1240 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1241 QualType getPointeeType() const { 1242 // FIXME: this might strip inner qualifiers; okay? 1243 const ReferenceType *T = this; 1244 while (T->InnerRef) 1245 T = T->PointeeType->getAs<ReferenceType>(); 1246 return T->PointeeType; 1247 } 1248 1249 void Profile(llvm::FoldingSetNodeID &ID) { 1250 Profile(ID, PointeeType, SpelledAsLValue); 1251 } 1252 static void Profile(llvm::FoldingSetNodeID &ID, 1253 QualType Referencee, 1254 bool SpelledAsLValue) { 1255 ID.AddPointer(Referencee.getAsOpaquePtr()); 1256 ID.AddBoolean(SpelledAsLValue); 1257 } 1258 1259 static bool classof(const Type *T) { 1260 return T->getTypeClass() == LValueReference || 1261 T->getTypeClass() == RValueReference; 1262 } 1263 static bool classof(const ReferenceType *) { return true; } 1264}; 1265 1266/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1267/// 1268class LValueReferenceType : public ReferenceType { 1269 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1270 bool SpelledAsLValue) : 1271 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1272 {} 1273 friend class ASTContext; // ASTContext creates these 1274public: 1275 bool isSugared() const { return false; } 1276 QualType desugar() const { return QualType(this, 0); } 1277 1278 static bool classof(const Type *T) { 1279 return T->getTypeClass() == LValueReference; 1280 } 1281 static bool classof(const LValueReferenceType *) { return true; } 1282}; 1283 1284/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1285/// 1286class RValueReferenceType : public ReferenceType { 1287 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1288 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1289 } 1290 friend class ASTContext; // ASTContext creates these 1291public: 1292 bool isSugared() const { return false; } 1293 QualType desugar() const { return QualType(this, 0); } 1294 1295 static bool classof(const Type *T) { 1296 return T->getTypeClass() == RValueReference; 1297 } 1298 static bool classof(const RValueReferenceType *) { return true; } 1299}; 1300 1301/// MemberPointerType - C++ 8.3.3 - Pointers to members 1302/// 1303class MemberPointerType : public Type, public llvm::FoldingSetNode { 1304 QualType PointeeType; 1305 /// The class of which the pointee is a member. Must ultimately be a 1306 /// RecordType, but could be a typedef or a template parameter too. 1307 const Type *Class; 1308 1309 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1310 Type(MemberPointer, CanonicalPtr, 1311 Cls->isDependentType() || Pointee->isDependentType()), 1312 PointeeType(Pointee), Class(Cls) { 1313 } 1314 friend class ASTContext; // ASTContext creates these. 1315 1316protected: 1317 virtual Linkage getLinkageImpl() const; 1318 1319public: 1320 1321 QualType getPointeeType() const { return PointeeType; } 1322 1323 const Type *getClass() const { return Class; } 1324 1325 bool isSugared() const { return false; } 1326 QualType desugar() const { return QualType(this, 0); } 1327 1328 void Profile(llvm::FoldingSetNodeID &ID) { 1329 Profile(ID, getPointeeType(), getClass()); 1330 } 1331 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1332 const Type *Class) { 1333 ID.AddPointer(Pointee.getAsOpaquePtr()); 1334 ID.AddPointer(Class); 1335 } 1336 1337 static bool classof(const Type *T) { 1338 return T->getTypeClass() == MemberPointer; 1339 } 1340 static bool classof(const MemberPointerType *) { return true; } 1341}; 1342 1343/// ArrayType - C99 6.7.5.2 - Array Declarators. 1344/// 1345class ArrayType : public Type, public llvm::FoldingSetNode { 1346public: 1347 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1348 /// an array with a static size (e.g. int X[static 4]), or an array 1349 /// with a star size (e.g. int X[*]). 1350 /// 'static' is only allowed on function parameters. 1351 enum ArraySizeModifier { 1352 Normal, Static, Star 1353 }; 1354private: 1355 /// ElementType - The element type of the array. 1356 QualType ElementType; 1357 1358 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1359 /// NOTE: These fields are packed into the bitfields space in the Type class. 1360 unsigned SizeModifier : 2; 1361 1362 /// IndexTypeQuals - Capture qualifiers in declarations like: 1363 /// 'int X[static restrict 4]'. For function parameters only. 1364 unsigned IndexTypeQuals : 3; 1365 1366protected: 1367 // C++ [temp.dep.type]p1: 1368 // A type is dependent if it is... 1369 // - an array type constructed from any dependent type or whose 1370 // size is specified by a constant expression that is 1371 // value-dependent, 1372 ArrayType(TypeClass tc, QualType et, QualType can, 1373 ArraySizeModifier sm, unsigned tq) 1374 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1375 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1376 1377 friend class ASTContext; // ASTContext creates these. 1378 1379 virtual Linkage getLinkageImpl() const; 1380 1381public: 1382 QualType getElementType() const { return ElementType; } 1383 ArraySizeModifier getSizeModifier() const { 1384 return ArraySizeModifier(SizeModifier); 1385 } 1386 Qualifiers getIndexTypeQualifiers() const { 1387 return Qualifiers::fromCVRMask(IndexTypeQuals); 1388 } 1389 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1390 1391 static bool classof(const Type *T) { 1392 return T->getTypeClass() == ConstantArray || 1393 T->getTypeClass() == VariableArray || 1394 T->getTypeClass() == IncompleteArray || 1395 T->getTypeClass() == DependentSizedArray; 1396 } 1397 static bool classof(const ArrayType *) { return true; } 1398}; 1399 1400/// ConstantArrayType - This class represents the canonical version of 1401/// C arrays with a specified constant size. For example, the canonical 1402/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1403/// type is 'int' and the size is 404. 1404class ConstantArrayType : public ArrayType { 1405 llvm::APInt Size; // Allows us to unique the type. 1406 1407 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1408 ArraySizeModifier sm, unsigned tq) 1409 : ArrayType(ConstantArray, et, can, sm, tq), 1410 Size(size) {} 1411protected: 1412 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1413 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1414 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1415 friend class ASTContext; // ASTContext creates these. 1416public: 1417 const llvm::APInt &getSize() const { return Size; } 1418 bool isSugared() const { return false; } 1419 QualType desugar() const { return QualType(this, 0); } 1420 1421 void Profile(llvm::FoldingSetNodeID &ID) { 1422 Profile(ID, getElementType(), getSize(), 1423 getSizeModifier(), getIndexTypeCVRQualifiers()); 1424 } 1425 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1426 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1427 unsigned TypeQuals) { 1428 ID.AddPointer(ET.getAsOpaquePtr()); 1429 ID.AddInteger(ArraySize.getZExtValue()); 1430 ID.AddInteger(SizeMod); 1431 ID.AddInteger(TypeQuals); 1432 } 1433 static bool classof(const Type *T) { 1434 return T->getTypeClass() == ConstantArray; 1435 } 1436 static bool classof(const ConstantArrayType *) { return true; } 1437}; 1438 1439/// IncompleteArrayType - This class represents C arrays with an unspecified 1440/// size. For example 'int A[]' has an IncompleteArrayType where the element 1441/// type is 'int' and the size is unspecified. 1442class IncompleteArrayType : public ArrayType { 1443 1444 IncompleteArrayType(QualType et, QualType can, 1445 ArraySizeModifier sm, unsigned tq) 1446 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1447 friend class ASTContext; // ASTContext creates these. 1448public: 1449 bool isSugared() const { return false; } 1450 QualType desugar() const { return QualType(this, 0); } 1451 1452 static bool classof(const Type *T) { 1453 return T->getTypeClass() == IncompleteArray; 1454 } 1455 static bool classof(const IncompleteArrayType *) { return true; } 1456 1457 friend class StmtIteratorBase; 1458 1459 void Profile(llvm::FoldingSetNodeID &ID) { 1460 Profile(ID, getElementType(), getSizeModifier(), 1461 getIndexTypeCVRQualifiers()); 1462 } 1463 1464 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1465 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1466 ID.AddPointer(ET.getAsOpaquePtr()); 1467 ID.AddInteger(SizeMod); 1468 ID.AddInteger(TypeQuals); 1469 } 1470}; 1471 1472/// VariableArrayType - This class represents C arrays with a specified size 1473/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1474/// Since the size expression is an arbitrary expression, we store it as such. 1475/// 1476/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1477/// should not be: two lexically equivalent variable array types could mean 1478/// different things, for example, these variables do not have the same type 1479/// dynamically: 1480/// 1481/// void foo(int x) { 1482/// int Y[x]; 1483/// ++x; 1484/// int Z[x]; 1485/// } 1486/// 1487class VariableArrayType : public ArrayType { 1488 /// SizeExpr - An assignment expression. VLA's are only permitted within 1489 /// a function block. 1490 Stmt *SizeExpr; 1491 /// Brackets - The left and right array brackets. 1492 SourceRange Brackets; 1493 1494 VariableArrayType(QualType et, QualType can, Expr *e, 1495 ArraySizeModifier sm, unsigned tq, 1496 SourceRange brackets) 1497 : ArrayType(VariableArray, et, can, sm, tq), 1498 SizeExpr((Stmt*) e), Brackets(brackets) {} 1499 friend class ASTContext; // ASTContext creates these. 1500 virtual void Destroy(ASTContext& C); 1501 1502public: 1503 Expr *getSizeExpr() const { 1504 // We use C-style casts instead of cast<> here because we do not wish 1505 // to have a dependency of Type.h on Stmt.h/Expr.h. 1506 return (Expr*) SizeExpr; 1507 } 1508 SourceRange getBracketsRange() const { return Brackets; } 1509 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1510 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1511 1512 bool isSugared() const { return false; } 1513 QualType desugar() const { return QualType(this, 0); } 1514 1515 static bool classof(const Type *T) { 1516 return T->getTypeClass() == VariableArray; 1517 } 1518 static bool classof(const VariableArrayType *) { return true; } 1519 1520 friend class StmtIteratorBase; 1521 1522 void Profile(llvm::FoldingSetNodeID &ID) { 1523 assert(0 && "Cannnot unique VariableArrayTypes."); 1524 } 1525}; 1526 1527/// DependentSizedArrayType - This type represents an array type in 1528/// C++ whose size is a value-dependent expression. For example: 1529/// 1530/// \code 1531/// template<typename T, int Size> 1532/// class array { 1533/// T data[Size]; 1534/// }; 1535/// \endcode 1536/// 1537/// For these types, we won't actually know what the array bound is 1538/// until template instantiation occurs, at which point this will 1539/// become either a ConstantArrayType or a VariableArrayType. 1540class DependentSizedArrayType : public ArrayType { 1541 ASTContext &Context; 1542 1543 /// \brief An assignment expression that will instantiate to the 1544 /// size of the array. 1545 /// 1546 /// The expression itself might be NULL, in which case the array 1547 /// type will have its size deduced from an initializer. 1548 Stmt *SizeExpr; 1549 1550 /// Brackets - The left and right array brackets. 1551 SourceRange Brackets; 1552 1553 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1554 Expr *e, ArraySizeModifier sm, unsigned tq, 1555 SourceRange brackets) 1556 : ArrayType(DependentSizedArray, et, can, sm, tq), 1557 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1558 friend class ASTContext; // ASTContext creates these. 1559 virtual void Destroy(ASTContext& C); 1560 1561public: 1562 Expr *getSizeExpr() const { 1563 // We use C-style casts instead of cast<> here because we do not wish 1564 // to have a dependency of Type.h on Stmt.h/Expr.h. 1565 return (Expr*) SizeExpr; 1566 } 1567 SourceRange getBracketsRange() const { return Brackets; } 1568 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1569 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1570 1571 bool isSugared() const { return false; } 1572 QualType desugar() const { return QualType(this, 0); } 1573 1574 static bool classof(const Type *T) { 1575 return T->getTypeClass() == DependentSizedArray; 1576 } 1577 static bool classof(const DependentSizedArrayType *) { return true; } 1578 1579 friend class StmtIteratorBase; 1580 1581 1582 void Profile(llvm::FoldingSetNodeID &ID) { 1583 Profile(ID, Context, getElementType(), 1584 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1585 } 1586 1587 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1588 QualType ET, ArraySizeModifier SizeMod, 1589 unsigned TypeQuals, Expr *E); 1590}; 1591 1592/// DependentSizedExtVectorType - This type represent an extended vector type 1593/// where either the type or size is dependent. For example: 1594/// @code 1595/// template<typename T, int Size> 1596/// class vector { 1597/// typedef T __attribute__((ext_vector_type(Size))) type; 1598/// } 1599/// @endcode 1600class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1601 ASTContext &Context; 1602 Expr *SizeExpr; 1603 /// ElementType - The element type of the array. 1604 QualType ElementType; 1605 SourceLocation loc; 1606 1607 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1608 QualType can, Expr *SizeExpr, SourceLocation loc) 1609 : Type (DependentSizedExtVector, can, true), 1610 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1611 loc(loc) {} 1612 friend class ASTContext; 1613 virtual void Destroy(ASTContext& C); 1614 1615public: 1616 Expr *getSizeExpr() const { return SizeExpr; } 1617 QualType getElementType() const { return ElementType; } 1618 SourceLocation getAttributeLoc() const { return loc; } 1619 1620 bool isSugared() const { return false; } 1621 QualType desugar() const { return QualType(this, 0); } 1622 1623 static bool classof(const Type *T) { 1624 return T->getTypeClass() == DependentSizedExtVector; 1625 } 1626 static bool classof(const DependentSizedExtVectorType *) { return true; } 1627 1628 void Profile(llvm::FoldingSetNodeID &ID) { 1629 Profile(ID, Context, getElementType(), getSizeExpr()); 1630 } 1631 1632 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1633 QualType ElementType, Expr *SizeExpr); 1634}; 1635 1636 1637/// VectorType - GCC generic vector type. This type is created using 1638/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1639/// bytes; or from an Altivec __vector or vector declaration. 1640/// Since the constructor takes the number of vector elements, the 1641/// client is responsible for converting the size into the number of elements. 1642class VectorType : public Type, public llvm::FoldingSetNode { 1643protected: 1644 /// ElementType - The element type of the vector. 1645 QualType ElementType; 1646 1647 /// NumElements - The number of elements in the vector. 1648 unsigned NumElements; 1649 1650 /// AltiVec - True if this is for an Altivec vector. 1651 bool AltiVec; 1652 1653 /// Pixel - True if this is for an Altivec vector pixel. 1654 bool Pixel; 1655 1656 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1657 bool isAltiVec, bool isPixel) : 1658 Type(Vector, canonType, vecType->isDependentType()), 1659 ElementType(vecType), NumElements(nElements), 1660 AltiVec(isAltiVec), Pixel(isPixel) {} 1661 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1662 QualType canonType, bool isAltiVec, bool isPixel) 1663 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1664 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1665 friend class ASTContext; // ASTContext creates these. 1666 1667 virtual Linkage getLinkageImpl() const; 1668 1669public: 1670 1671 QualType getElementType() const { return ElementType; } 1672 unsigned getNumElements() const { return NumElements; } 1673 1674 bool isSugared() const { return false; } 1675 QualType desugar() const { return QualType(this, 0); } 1676 1677 bool isAltiVec() const { return AltiVec; } 1678 1679 bool isPixel() const { return Pixel; } 1680 1681 void Profile(llvm::FoldingSetNodeID &ID) { 1682 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1683 AltiVec, Pixel); 1684 } 1685 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1686 unsigned NumElements, TypeClass TypeClass, 1687 bool isAltiVec, bool isPixel) { 1688 ID.AddPointer(ElementType.getAsOpaquePtr()); 1689 ID.AddInteger(NumElements); 1690 ID.AddInteger(TypeClass); 1691 ID.AddBoolean(isAltiVec); 1692 ID.AddBoolean(isPixel); 1693 } 1694 1695 static bool classof(const Type *T) { 1696 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1697 } 1698 static bool classof(const VectorType *) { return true; } 1699}; 1700 1701/// ExtVectorType - Extended vector type. This type is created using 1702/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1703/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1704/// class enables syntactic extensions, like Vector Components for accessing 1705/// points, colors, and textures (modeled after OpenGL Shading Language). 1706class ExtVectorType : public VectorType { 1707 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1708 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1709 friend class ASTContext; // ASTContext creates these. 1710public: 1711 static int getPointAccessorIdx(char c) { 1712 switch (c) { 1713 default: return -1; 1714 case 'x': return 0; 1715 case 'y': return 1; 1716 case 'z': return 2; 1717 case 'w': return 3; 1718 } 1719 } 1720 static int getNumericAccessorIdx(char c) { 1721 switch (c) { 1722 default: return -1; 1723 case '0': return 0; 1724 case '1': return 1; 1725 case '2': return 2; 1726 case '3': return 3; 1727 case '4': return 4; 1728 case '5': return 5; 1729 case '6': return 6; 1730 case '7': return 7; 1731 case '8': return 8; 1732 case '9': return 9; 1733 case 'A': 1734 case 'a': return 10; 1735 case 'B': 1736 case 'b': return 11; 1737 case 'C': 1738 case 'c': return 12; 1739 case 'D': 1740 case 'd': return 13; 1741 case 'E': 1742 case 'e': return 14; 1743 case 'F': 1744 case 'f': return 15; 1745 } 1746 } 1747 1748 static int getAccessorIdx(char c) { 1749 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1750 return getNumericAccessorIdx(c); 1751 } 1752 1753 bool isAccessorWithinNumElements(char c) const { 1754 if (int idx = getAccessorIdx(c)+1) 1755 return unsigned(idx-1) < NumElements; 1756 return false; 1757 } 1758 bool isSugared() const { return false; } 1759 QualType desugar() const { return QualType(this, 0); } 1760 1761 static bool classof(const Type *T) { 1762 return T->getTypeClass() == ExtVector; 1763 } 1764 static bool classof(const ExtVectorType *) { return true; } 1765}; 1766 1767/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1768/// class of FunctionNoProtoType and FunctionProtoType. 1769/// 1770class FunctionType : public Type { 1771 virtual void ANCHOR(); // Key function for FunctionType. 1772 1773 /// SubClassData - This field is owned by the subclass, put here to pack 1774 /// tightly with the ivars in Type. 1775 bool SubClassData : 1; 1776 1777 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1778 /// other bitfields. 1779 /// The qualifiers are part of FunctionProtoType because... 1780 /// 1781 /// C++ 8.3.5p4: The return type, the parameter type list and the 1782 /// cv-qualifier-seq, [...], are part of the function type. 1783 /// 1784 unsigned TypeQuals : 3; 1785 1786 /// NoReturn - Indicates if the function type is attribute noreturn. 1787 unsigned NoReturn : 1; 1788 1789 /// RegParm - How many arguments to pass inreg. 1790 unsigned RegParm : 3; 1791 1792 /// CallConv - The calling convention used by the function. 1793 unsigned CallConv : 3; 1794 1795 // The type returned by the function. 1796 QualType ResultType; 1797 1798 public: 1799 // This class is used for passing arround the information needed to 1800 // construct a call. It is not actually used for storage, just for 1801 // factoring together common arguments. 1802 // If you add a field (say Foo), other than the obvious places (both, constructors, 1803 // compile failures), what you need to update is 1804 // * Operetor== 1805 // * getFoo 1806 // * withFoo 1807 // * functionType. Add Foo, getFoo. 1808 // * ASTContext::getFooType 1809 // * ASTContext::mergeFunctionTypes 1810 // * FunctionNoProtoType::Profile 1811 // * FunctionProtoType::Profile 1812 // * TypePrinter::PrintFunctionProto 1813 // * PCH read and write 1814 // * Codegen 1815 1816 class ExtInfo { 1817 public: 1818 // Constructor with no defaults. Use this when you know that you 1819 // have all the elements (when reading a PCH file for example). 1820 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1821 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1822 1823 // Constructor with all defaults. Use when for example creating a 1824 // function know to use defaults. 1825 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1826 1827 bool getNoReturn() const { return NoReturn; } 1828 unsigned getRegParm() const { return RegParm; } 1829 CallingConv getCC() const { return CC; } 1830 1831 bool operator==(const ExtInfo &Other) const { 1832 return getNoReturn() == Other.getNoReturn() && 1833 getRegParm() == Other.getRegParm() && 1834 getCC() == Other.getCC(); 1835 } 1836 bool operator!=(const ExtInfo &Other) const { 1837 return !(*this == Other); 1838 } 1839 1840 // Note that we don't have setters. That is by design, use 1841 // the following with methods instead of mutating these objects. 1842 1843 ExtInfo withNoReturn(bool noReturn) const { 1844 return ExtInfo(noReturn, getRegParm(), getCC()); 1845 } 1846 1847 ExtInfo withRegParm(unsigned RegParm) const { 1848 return ExtInfo(getNoReturn(), RegParm, getCC()); 1849 } 1850 1851 ExtInfo withCallingConv(CallingConv cc) const { 1852 return ExtInfo(getNoReturn(), getRegParm(), cc); 1853 } 1854 1855 private: 1856 // True if we have __attribute__((noreturn)) 1857 bool NoReturn; 1858 // The value passed to __attribute__((regparm(x))) 1859 unsigned RegParm; 1860 // The calling convention as specified via 1861 // __attribute__((cdecl|stdcall|fastcall|thiscall)) 1862 CallingConv CC; 1863 }; 1864 1865protected: 1866 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1867 unsigned typeQuals, QualType Canonical, bool Dependent, 1868 const ExtInfo &Info) 1869 : Type(tc, Canonical, Dependent), 1870 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1871 NoReturn(Info.getNoReturn()), 1872 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1873 bool getSubClassData() const { return SubClassData; } 1874 unsigned getTypeQuals() const { return TypeQuals; } 1875public: 1876 1877 QualType getResultType() const { return ResultType; } 1878 unsigned getRegParmType() const { return RegParm; } 1879 bool getNoReturnAttr() const { return NoReturn; } 1880 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1881 ExtInfo getExtInfo() const { 1882 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1883 } 1884 1885 static llvm::StringRef getNameForCallConv(CallingConv CC); 1886 1887 static bool classof(const Type *T) { 1888 return T->getTypeClass() == FunctionNoProto || 1889 T->getTypeClass() == FunctionProto; 1890 } 1891 static bool classof(const FunctionType *) { return true; } 1892}; 1893 1894/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1895/// no information available about its arguments. 1896class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1897 FunctionNoProtoType(QualType Result, QualType Canonical, 1898 const ExtInfo &Info) 1899 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1900 /*Dependent=*/false, Info) {} 1901 friend class ASTContext; // ASTContext creates these. 1902 1903protected: 1904 virtual Linkage getLinkageImpl() const; 1905 1906public: 1907 // No additional state past what FunctionType provides. 1908 1909 bool isSugared() const { return false; } 1910 QualType desugar() const { return QualType(this, 0); } 1911 1912 void Profile(llvm::FoldingSetNodeID &ID) { 1913 Profile(ID, getResultType(), getExtInfo()); 1914 } 1915 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1916 const ExtInfo &Info) { 1917 ID.AddInteger(Info.getCC()); 1918 ID.AddInteger(Info.getRegParm()); 1919 ID.AddInteger(Info.getNoReturn()); 1920 ID.AddPointer(ResultType.getAsOpaquePtr()); 1921 } 1922 1923 static bool classof(const Type *T) { 1924 return T->getTypeClass() == FunctionNoProto; 1925 } 1926 static bool classof(const FunctionNoProtoType *) { return true; } 1927}; 1928 1929/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1930/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1931/// arguments, not as having a single void argument. Such a type can have an 1932/// exception specification, but this specification is not part of the canonical 1933/// type. 1934class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1935 /// hasAnyDependentType - Determine whether there are any dependent 1936 /// types within the arguments passed in. 1937 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1938 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1939 if (ArgArray[Idx]->isDependentType()) 1940 return true; 1941 1942 return false; 1943 } 1944 1945 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1946 bool isVariadic, unsigned typeQuals, bool hasExs, 1947 bool hasAnyExs, const QualType *ExArray, 1948 unsigned numExs, QualType Canonical, 1949 const ExtInfo &Info) 1950 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1951 (Result->isDependentType() || 1952 hasAnyDependentType(ArgArray, numArgs)), 1953 Info), 1954 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1955 AnyExceptionSpec(hasAnyExs) { 1956 // Fill in the trailing argument array. 1957 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1958 for (unsigned i = 0; i != numArgs; ++i) 1959 ArgInfo[i] = ArgArray[i]; 1960 // Fill in the exception array. 1961 QualType *Ex = ArgInfo + numArgs; 1962 for (unsigned i = 0; i != numExs; ++i) 1963 Ex[i] = ExArray[i]; 1964 } 1965 1966 /// NumArgs - The number of arguments this function has, not counting '...'. 1967 unsigned NumArgs : 20; 1968 1969 /// NumExceptions - The number of types in the exception spec, if any. 1970 unsigned NumExceptions : 10; 1971 1972 /// HasExceptionSpec - Whether this function has an exception spec at all. 1973 bool HasExceptionSpec : 1; 1974 1975 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1976 bool AnyExceptionSpec : 1; 1977 1978 /// ArgInfo - There is an variable size array after the class in memory that 1979 /// holds the argument types. 1980 1981 /// Exceptions - There is another variable size array after ArgInfo that 1982 /// holds the exception types. 1983 1984 friend class ASTContext; // ASTContext creates these. 1985 1986protected: 1987 virtual Linkage getLinkageImpl() const; 1988 1989public: 1990 unsigned getNumArgs() const { return NumArgs; } 1991 QualType getArgType(unsigned i) const { 1992 assert(i < NumArgs && "Invalid argument number!"); 1993 return arg_type_begin()[i]; 1994 } 1995 1996 bool hasExceptionSpec() const { return HasExceptionSpec; } 1997 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1998 unsigned getNumExceptions() const { return NumExceptions; } 1999 QualType getExceptionType(unsigned i) const { 2000 assert(i < NumExceptions && "Invalid exception number!"); 2001 return exception_begin()[i]; 2002 } 2003 bool hasEmptyExceptionSpec() const { 2004 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2005 getNumExceptions() == 0; 2006 } 2007 2008 bool isVariadic() const { return getSubClassData(); } 2009 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2010 2011 typedef const QualType *arg_type_iterator; 2012 arg_type_iterator arg_type_begin() const { 2013 return reinterpret_cast<const QualType *>(this+1); 2014 } 2015 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2016 2017 typedef const QualType *exception_iterator; 2018 exception_iterator exception_begin() const { 2019 // exceptions begin where arguments end 2020 return arg_type_end(); 2021 } 2022 exception_iterator exception_end() const { 2023 return exception_begin() + NumExceptions; 2024 } 2025 2026 bool isSugared() const { return false; } 2027 QualType desugar() const { return QualType(this, 0); } 2028 2029 static bool classof(const Type *T) { 2030 return T->getTypeClass() == FunctionProto; 2031 } 2032 static bool classof(const FunctionProtoType *) { return true; } 2033 2034 void Profile(llvm::FoldingSetNodeID &ID); 2035 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2036 arg_type_iterator ArgTys, unsigned NumArgs, 2037 bool isVariadic, unsigned TypeQuals, 2038 bool hasExceptionSpec, bool anyExceptionSpec, 2039 unsigned NumExceptions, exception_iterator Exs, 2040 const ExtInfo &ExtInfo); 2041}; 2042 2043 2044/// \brief Represents the dependent type named by a dependently-scoped 2045/// typename using declaration, e.g. 2046/// using typename Base<T>::foo; 2047/// Template instantiation turns these into the underlying type. 2048class UnresolvedUsingType : public Type { 2049 UnresolvedUsingTypenameDecl *Decl; 2050 2051 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2052 : Type(UnresolvedUsing, QualType(), true), 2053 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2054 friend class ASTContext; // ASTContext creates these. 2055public: 2056 2057 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2058 2059 bool isSugared() const { return false; } 2060 QualType desugar() const { return QualType(this, 0); } 2061 2062 static bool classof(const Type *T) { 2063 return T->getTypeClass() == UnresolvedUsing; 2064 } 2065 static bool classof(const UnresolvedUsingType *) { return true; } 2066 2067 void Profile(llvm::FoldingSetNodeID &ID) { 2068 return Profile(ID, Decl); 2069 } 2070 static void Profile(llvm::FoldingSetNodeID &ID, 2071 UnresolvedUsingTypenameDecl *D) { 2072 ID.AddPointer(D); 2073 } 2074}; 2075 2076 2077class TypedefType : public Type { 2078 TypedefDecl *Decl; 2079protected: 2080 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2081 : Type(tc, can, can->isDependentType()), 2082 Decl(const_cast<TypedefDecl*>(D)) { 2083 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2084 } 2085 friend class ASTContext; // ASTContext creates these. 2086public: 2087 2088 TypedefDecl *getDecl() const { return Decl; } 2089 2090 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2091 /// potentially looking through *all* consecutive typedefs. This returns the 2092 /// sum of the type qualifiers, so if you have: 2093 /// typedef const int A; 2094 /// typedef volatile A B; 2095 /// looking through the typedefs for B will give you "const volatile A". 2096 QualType LookThroughTypedefs() const; 2097 2098 bool isSugared() const { return true; } 2099 QualType desugar() const; 2100 2101 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2102 static bool classof(const TypedefType *) { return true; } 2103}; 2104 2105/// TypeOfExprType (GCC extension). 2106class TypeOfExprType : public Type { 2107 Expr *TOExpr; 2108 2109protected: 2110 TypeOfExprType(Expr *E, QualType can = QualType()); 2111 friend class ASTContext; // ASTContext creates these. 2112public: 2113 Expr *getUnderlyingExpr() const { return TOExpr; } 2114 2115 /// \brief Remove a single level of sugar. 2116 QualType desugar() const; 2117 2118 /// \brief Returns whether this type directly provides sugar. 2119 bool isSugared() const { return true; } 2120 2121 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2122 static bool classof(const TypeOfExprType *) { return true; } 2123}; 2124 2125/// \brief Internal representation of canonical, dependent 2126/// typeof(expr) types. 2127/// 2128/// This class is used internally by the ASTContext to manage 2129/// canonical, dependent types, only. Clients will only see instances 2130/// of this class via TypeOfExprType nodes. 2131class DependentTypeOfExprType 2132 : public TypeOfExprType, public llvm::FoldingSetNode { 2133 ASTContext &Context; 2134 2135public: 2136 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2137 : TypeOfExprType(E), Context(Context) { } 2138 2139 bool isSugared() const { return false; } 2140 QualType desugar() const { return QualType(this, 0); } 2141 2142 void Profile(llvm::FoldingSetNodeID &ID) { 2143 Profile(ID, Context, getUnderlyingExpr()); 2144 } 2145 2146 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2147 Expr *E); 2148}; 2149 2150/// TypeOfType (GCC extension). 2151class TypeOfType : public Type { 2152 QualType TOType; 2153 TypeOfType(QualType T, QualType can) 2154 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2155 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2156 } 2157 friend class ASTContext; // ASTContext creates these. 2158public: 2159 QualType getUnderlyingType() const { return TOType; } 2160 2161 /// \brief Remove a single level of sugar. 2162 QualType desugar() const { return getUnderlyingType(); } 2163 2164 /// \brief Returns whether this type directly provides sugar. 2165 bool isSugared() const { return true; } 2166 2167 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2168 static bool classof(const TypeOfType *) { return true; } 2169}; 2170 2171/// DecltypeType (C++0x) 2172class DecltypeType : public Type { 2173 Expr *E; 2174 2175 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2176 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2177 // from it. 2178 QualType UnderlyingType; 2179 2180protected: 2181 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2182 friend class ASTContext; // ASTContext creates these. 2183public: 2184 Expr *getUnderlyingExpr() const { return E; } 2185 QualType getUnderlyingType() const { return UnderlyingType; } 2186 2187 /// \brief Remove a single level of sugar. 2188 QualType desugar() const { return getUnderlyingType(); } 2189 2190 /// \brief Returns whether this type directly provides sugar. 2191 bool isSugared() const { return !isDependentType(); } 2192 2193 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2194 static bool classof(const DecltypeType *) { return true; } 2195}; 2196 2197/// \brief Internal representation of canonical, dependent 2198/// decltype(expr) types. 2199/// 2200/// This class is used internally by the ASTContext to manage 2201/// canonical, dependent types, only. Clients will only see instances 2202/// of this class via DecltypeType nodes. 2203class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2204 ASTContext &Context; 2205 2206public: 2207 DependentDecltypeType(ASTContext &Context, Expr *E); 2208 2209 bool isSugared() const { return false; } 2210 QualType desugar() const { return QualType(this, 0); } 2211 2212 void Profile(llvm::FoldingSetNodeID &ID) { 2213 Profile(ID, Context, getUnderlyingExpr()); 2214 } 2215 2216 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2217 Expr *E); 2218}; 2219 2220class TagType : public Type { 2221 /// Stores the TagDecl associated with this type. The decl will 2222 /// point to the TagDecl that actually defines the entity (or is a 2223 /// definition in progress), if there is such a definition. The 2224 /// single-bit value will be non-zero when this tag is in the 2225 /// process of being defined. 2226 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2227 friend class ASTContext; 2228 friend class TagDecl; 2229 2230protected: 2231 TagType(TypeClass TC, const TagDecl *D, QualType can); 2232 2233 virtual Linkage getLinkageImpl() const; 2234 2235public: 2236 TagDecl *getDecl() const { return decl.getPointer(); } 2237 2238 /// @brief Determines whether this type is in the process of being 2239 /// defined. 2240 bool isBeingDefined() const { return decl.getInt(); } 2241 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2242 2243 static bool classof(const Type *T) { 2244 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2245 } 2246 static bool classof(const TagType *) { return true; } 2247 static bool classof(const RecordType *) { return true; } 2248 static bool classof(const EnumType *) { return true; } 2249}; 2250 2251/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2252/// to detect TagType objects of structs/unions/classes. 2253class RecordType : public TagType { 2254protected: 2255 explicit RecordType(const RecordDecl *D) 2256 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2257 explicit RecordType(TypeClass TC, RecordDecl *D) 2258 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2259 friend class ASTContext; // ASTContext creates these. 2260public: 2261 2262 RecordDecl *getDecl() const { 2263 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2264 } 2265 2266 // FIXME: This predicate is a helper to QualType/Type. It needs to 2267 // recursively check all fields for const-ness. If any field is declared 2268 // const, it needs to return false. 2269 bool hasConstFields() const { return false; } 2270 2271 // FIXME: RecordType needs to check when it is created that all fields are in 2272 // the same address space, and return that. 2273 unsigned getAddressSpace() const { return 0; } 2274 2275 bool isSugared() const { return false; } 2276 QualType desugar() const { return QualType(this, 0); } 2277 2278 static bool classof(const TagType *T); 2279 static bool classof(const Type *T) { 2280 return isa<TagType>(T) && classof(cast<TagType>(T)); 2281 } 2282 static bool classof(const RecordType *) { return true; } 2283}; 2284 2285/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2286/// to detect TagType objects of enums. 2287class EnumType : public TagType { 2288 explicit EnumType(const EnumDecl *D) 2289 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2290 friend class ASTContext; // ASTContext creates these. 2291public: 2292 2293 EnumDecl *getDecl() const { 2294 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2295 } 2296 2297 bool isSugared() const { return false; } 2298 QualType desugar() const { return QualType(this, 0); } 2299 2300 static bool classof(const TagType *T); 2301 static bool classof(const Type *T) { 2302 return isa<TagType>(T) && classof(cast<TagType>(T)); 2303 } 2304 static bool classof(const EnumType *) { return true; } 2305}; 2306 2307class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2308 unsigned Depth : 15; 2309 unsigned Index : 16; 2310 unsigned ParameterPack : 1; 2311 IdentifierInfo *Name; 2312 2313 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2314 QualType Canon) 2315 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2316 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2317 2318 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2319 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2320 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2321 2322 friend class ASTContext; // ASTContext creates these 2323 2324public: 2325 unsigned getDepth() const { return Depth; } 2326 unsigned getIndex() const { return Index; } 2327 bool isParameterPack() const { return ParameterPack; } 2328 IdentifierInfo *getName() const { return Name; } 2329 2330 bool isSugared() const { return false; } 2331 QualType desugar() const { return QualType(this, 0); } 2332 2333 void Profile(llvm::FoldingSetNodeID &ID) { 2334 Profile(ID, Depth, Index, ParameterPack, Name); 2335 } 2336 2337 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2338 unsigned Index, bool ParameterPack, 2339 IdentifierInfo *Name) { 2340 ID.AddInteger(Depth); 2341 ID.AddInteger(Index); 2342 ID.AddBoolean(ParameterPack); 2343 ID.AddPointer(Name); 2344 } 2345 2346 static bool classof(const Type *T) { 2347 return T->getTypeClass() == TemplateTypeParm; 2348 } 2349 static bool classof(const TemplateTypeParmType *T) { return true; } 2350}; 2351 2352/// \brief Represents the result of substituting a type for a template 2353/// type parameter. 2354/// 2355/// Within an instantiated template, all template type parameters have 2356/// been replaced with these. They are used solely to record that a 2357/// type was originally written as a template type parameter; 2358/// therefore they are never canonical. 2359class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2360 // The original type parameter. 2361 const TemplateTypeParmType *Replaced; 2362 2363 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2364 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2365 Replaced(Param) { } 2366 2367 friend class ASTContext; 2368 2369public: 2370 IdentifierInfo *getName() const { return Replaced->getName(); } 2371 2372 /// Gets the template parameter that was substituted for. 2373 const TemplateTypeParmType *getReplacedParameter() const { 2374 return Replaced; 2375 } 2376 2377 /// Gets the type that was substituted for the template 2378 /// parameter. 2379 QualType getReplacementType() const { 2380 return getCanonicalTypeInternal(); 2381 } 2382 2383 bool isSugared() const { return true; } 2384 QualType desugar() const { return getReplacementType(); } 2385 2386 void Profile(llvm::FoldingSetNodeID &ID) { 2387 Profile(ID, getReplacedParameter(), getReplacementType()); 2388 } 2389 static void Profile(llvm::FoldingSetNodeID &ID, 2390 const TemplateTypeParmType *Replaced, 2391 QualType Replacement) { 2392 ID.AddPointer(Replaced); 2393 ID.AddPointer(Replacement.getAsOpaquePtr()); 2394 } 2395 2396 static bool classof(const Type *T) { 2397 return T->getTypeClass() == SubstTemplateTypeParm; 2398 } 2399 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2400}; 2401 2402/// \brief Represents the type of a template specialization as written 2403/// in the source code. 2404/// 2405/// Template specialization types represent the syntactic form of a 2406/// template-id that refers to a type, e.g., @c vector<int>. Some 2407/// template specialization types are syntactic sugar, whose canonical 2408/// type will point to some other type node that represents the 2409/// instantiation or class template specialization. For example, a 2410/// class template specialization type of @c vector<int> will refer to 2411/// a tag type for the instantiation 2412/// @c std::vector<int, std::allocator<int>>. 2413/// 2414/// Other template specialization types, for which the template name 2415/// is dependent, may be canonical types. These types are always 2416/// dependent. 2417class TemplateSpecializationType 2418 : public Type, public llvm::FoldingSetNode { 2419 2420 // The ASTContext is currently needed in order to profile expressions. 2421 // FIXME: avoid this. 2422 // 2423 // The bool is whether this is a current instantiation. 2424 llvm::PointerIntPair<ASTContext*, 1, bool> ContextAndCurrentInstantiation; 2425 2426 /// \brief The name of the template being specialized. 2427 TemplateName Template; 2428 2429 /// \brief - The number of template arguments named in this class 2430 /// template specialization. 2431 unsigned NumArgs; 2432 2433 TemplateSpecializationType(ASTContext &Context, 2434 TemplateName T, 2435 bool IsCurrentInstantiation, 2436 const TemplateArgument *Args, 2437 unsigned NumArgs, QualType Canon); 2438 2439 virtual void Destroy(ASTContext& C); 2440 2441 friend class ASTContext; // ASTContext creates these 2442 2443public: 2444 /// \brief Determine whether any of the given template arguments are 2445 /// dependent. 2446 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2447 unsigned NumArgs); 2448 2449 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2450 unsigned NumArgs); 2451 2452 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2453 2454 /// \brief Print a template argument list, including the '<' and '>' 2455 /// enclosing the template arguments. 2456 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2457 unsigned NumArgs, 2458 const PrintingPolicy &Policy); 2459 2460 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2461 unsigned NumArgs, 2462 const PrintingPolicy &Policy); 2463 2464 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2465 const PrintingPolicy &Policy); 2466 2467 /// True if this template specialization type matches a current 2468 /// instantiation in the context in which it is found. 2469 bool isCurrentInstantiation() const { 2470 return ContextAndCurrentInstantiation.getInt(); 2471 } 2472 2473 typedef const TemplateArgument * iterator; 2474 2475 iterator begin() const { return getArgs(); } 2476 iterator end() const; 2477 2478 /// \brief Retrieve the name of the template that we are specializing. 2479 TemplateName getTemplateName() const { return Template; } 2480 2481 /// \brief Retrieve the template arguments. 2482 const TemplateArgument *getArgs() const { 2483 return reinterpret_cast<const TemplateArgument *>(this + 1); 2484 } 2485 2486 /// \brief Retrieve the number of template arguments. 2487 unsigned getNumArgs() const { return NumArgs; } 2488 2489 /// \brief Retrieve a specific template argument as a type. 2490 /// \precondition @c isArgType(Arg) 2491 const TemplateArgument &getArg(unsigned Idx) const; 2492 2493 bool isSugared() const { 2494 return !isDependentType() || isCurrentInstantiation(); 2495 } 2496 QualType desugar() const { return getCanonicalTypeInternal(); } 2497 2498 void Profile(llvm::FoldingSetNodeID &ID) { 2499 Profile(ID, Template, isCurrentInstantiation(), getArgs(), NumArgs, 2500 *ContextAndCurrentInstantiation.getPointer()); 2501 } 2502 2503 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2504 bool IsCurrentInstantiation, 2505 const TemplateArgument *Args, 2506 unsigned NumArgs, 2507 ASTContext &Context); 2508 2509 static bool classof(const Type *T) { 2510 return T->getTypeClass() == TemplateSpecialization; 2511 } 2512 static bool classof(const TemplateSpecializationType *T) { return true; } 2513}; 2514 2515/// \brief The injected class name of a C++ class template or class 2516/// template partial specialization. Used to record that a type was 2517/// spelled with a bare identifier rather than as a template-id; the 2518/// equivalent for non-templated classes is just RecordType. 2519/// 2520/// Injected class name types are always dependent. Template 2521/// instantiation turns these into RecordTypes. 2522/// 2523/// Injected class name types are always canonical. This works 2524/// because it is impossible to compare an injected class name type 2525/// with the corresponding non-injected template type, for the same 2526/// reason that it is impossible to directly compare template 2527/// parameters from different dependent contexts: injected class name 2528/// types can only occur within the scope of a particular templated 2529/// declaration, and within that scope every template specialization 2530/// will canonicalize to the injected class name (when appropriate 2531/// according to the rules of the language). 2532class InjectedClassNameType : public Type { 2533 CXXRecordDecl *Decl; 2534 2535 /// The template specialization which this type represents. 2536 /// For example, in 2537 /// template <class T> class A { ... }; 2538 /// this is A<T>, whereas in 2539 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2540 /// this is A<B<X,Y> >. 2541 /// 2542 /// It is always unqualified, always a template specialization type, 2543 /// and always dependent. 2544 QualType InjectedType; 2545 2546 friend class ASTContext; // ASTContext creates these. 2547 friend class TagDecl; // TagDecl mutilates the Decl 2548 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2549 : Type(InjectedClassName, QualType(), true), 2550 Decl(D), InjectedType(TST) { 2551 assert(isa<TemplateSpecializationType>(TST)); 2552 assert(!TST.hasQualifiers()); 2553 assert(TST->isDependentType()); 2554 } 2555 2556public: 2557 QualType getInjectedSpecializationType() const { return InjectedType; } 2558 const TemplateSpecializationType *getInjectedTST() const { 2559 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2560 } 2561 2562 CXXRecordDecl *getDecl() const { return Decl; } 2563 2564 bool isSugared() const { return false; } 2565 QualType desugar() const { return QualType(this, 0); } 2566 2567 static bool classof(const Type *T) { 2568 return T->getTypeClass() == InjectedClassName; 2569 } 2570 static bool classof(const InjectedClassNameType *T) { return true; } 2571}; 2572 2573/// \brief The kind of a tag type. 2574enum TagTypeKind { 2575 /// \brief The "struct" keyword. 2576 TTK_Struct, 2577 /// \brief The "union" keyword. 2578 TTK_Union, 2579 /// \brief The "class" keyword. 2580 TTK_Class, 2581 /// \brief The "enum" keyword. 2582 TTK_Enum 2583}; 2584 2585/// \brief The elaboration keyword that precedes a qualified type name or 2586/// introduces an elaborated-type-specifier. 2587enum ElaboratedTypeKeyword { 2588 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2589 ETK_Struct, 2590 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2591 ETK_Union, 2592 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2593 ETK_Class, 2594 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2595 ETK_Enum, 2596 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2597 /// \c typename T::type. 2598 ETK_Typename, 2599 /// \brief No keyword precedes the qualified type name. 2600 ETK_None 2601}; 2602 2603/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2604/// The keyword in stored in the free bits of the base class. 2605/// Also provides a few static helpers for converting and printing 2606/// elaborated type keyword and tag type kind enumerations. 2607class TypeWithKeyword : public Type { 2608 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2609 unsigned Keyword : 3; 2610 2611protected: 2612 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2613 QualType Canonical, bool dependent) 2614 : Type(tc, Canonical, dependent), Keyword(Keyword) {} 2615 2616public: 2617 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2618 2619 ElaboratedTypeKeyword getKeyword() const { 2620 return static_cast<ElaboratedTypeKeyword>(Keyword); 2621 } 2622 2623 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2624 /// into an elaborated type keyword. 2625 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2626 2627 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2628 /// into a tag type kind. It is an error to provide a type specifier 2629 /// which *isn't* a tag kind here. 2630 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2631 2632 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2633 /// elaborated type keyword. 2634 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2635 2636 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2637 // a TagTypeKind. It is an error to provide an elaborated type keyword 2638 /// which *isn't* a tag kind here. 2639 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2640 2641 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2642 2643 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2644 2645 static const char *getTagTypeKindName(TagTypeKind Kind) { 2646 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2647 } 2648 2649 class CannotCastToThisType {}; 2650 static CannotCastToThisType classof(const Type *); 2651}; 2652 2653/// \brief Represents a type that was referred to using an elaborated type 2654/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2655/// or both. 2656/// 2657/// This type is used to keep track of a type name as written in the 2658/// source code, including tag keywords and any nested-name-specifiers. 2659/// The type itself is always "sugar", used to express what was written 2660/// in the source code but containing no additional semantic information. 2661class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2662 2663 /// \brief The nested name specifier containing the qualifier. 2664 NestedNameSpecifier *NNS; 2665 2666 /// \brief The type that this qualified name refers to. 2667 QualType NamedType; 2668 2669 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2670 QualType NamedType, QualType CanonType) 2671 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2672 NamedType->isDependentType()), 2673 NNS(NNS), NamedType(NamedType) { 2674 assert(!(Keyword == ETK_None && NNS == 0) && 2675 "ElaboratedType cannot have elaborated type keyword " 2676 "and name qualifier both null."); 2677 } 2678 2679 friend class ASTContext; // ASTContext creates these 2680 2681public: 2682 2683 /// \brief Retrieve the qualification on this type. 2684 NestedNameSpecifier *getQualifier() const { return NNS; } 2685 2686 /// \brief Retrieve the type named by the qualified-id. 2687 QualType getNamedType() const { return NamedType; } 2688 2689 /// \brief Remove a single level of sugar. 2690 QualType desugar() const { return getNamedType(); } 2691 2692 /// \brief Returns whether this type directly provides sugar. 2693 bool isSugared() const { return true; } 2694 2695 void Profile(llvm::FoldingSetNodeID &ID) { 2696 Profile(ID, getKeyword(), NNS, NamedType); 2697 } 2698 2699 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2700 NestedNameSpecifier *NNS, QualType NamedType) { 2701 ID.AddInteger(Keyword); 2702 ID.AddPointer(NNS); 2703 NamedType.Profile(ID); 2704 } 2705 2706 static bool classof(const Type *T) { 2707 return T->getTypeClass() == Elaborated; 2708 } 2709 static bool classof(const ElaboratedType *T) { return true; } 2710}; 2711 2712/// \brief Represents a qualified type name for which the type name is 2713/// dependent. 2714/// 2715/// DependentNameType represents a class of dependent types that involve a 2716/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2717/// name of a type. The DependentNameType may start with a "typename" (for a 2718/// typename-specifier), "class", "struct", "union", or "enum" (for a 2719/// dependent elaborated-type-specifier), or nothing (in contexts where we 2720/// know that we must be referring to a type, e.g., in a base class specifier). 2721class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2722 2723 /// \brief The nested name specifier containing the qualifier. 2724 NestedNameSpecifier *NNS; 2725 2726 typedef llvm::PointerUnion<const IdentifierInfo *, 2727 const TemplateSpecializationType *> NameType; 2728 2729 /// \brief The type that this typename specifier refers to. 2730 NameType Name; 2731 2732 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2733 const IdentifierInfo *Name, QualType CanonType) 2734 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2735 NNS(NNS), Name(Name) { 2736 assert(NNS->isDependent() && 2737 "DependentNameType requires a dependent nested-name-specifier"); 2738 } 2739 2740 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2741 const TemplateSpecializationType *Ty, QualType CanonType) 2742 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2743 NNS(NNS), Name(Ty) { 2744 assert(NNS->isDependent() && 2745 "DependentNameType requires a dependent nested-name-specifier"); 2746 } 2747 2748 friend class ASTContext; // ASTContext creates these 2749 2750public: 2751 2752 /// \brief Retrieve the qualification on this type. 2753 NestedNameSpecifier *getQualifier() const { return NNS; } 2754 2755 /// \brief Retrieve the type named by the typename specifier as an 2756 /// identifier. 2757 /// 2758 /// This routine will return a non-NULL identifier pointer when the 2759 /// form of the original typename was terminated by an identifier, 2760 /// e.g., "typename T::type". 2761 const IdentifierInfo *getIdentifier() const { 2762 return Name.dyn_cast<const IdentifierInfo *>(); 2763 } 2764 2765 /// \brief Retrieve the type named by the typename specifier as a 2766 /// type specialization. 2767 const TemplateSpecializationType *getTemplateId() const { 2768 return Name.dyn_cast<const TemplateSpecializationType *>(); 2769 } 2770 2771 bool isSugared() const { return false; } 2772 QualType desugar() const { return QualType(this, 0); } 2773 2774 void Profile(llvm::FoldingSetNodeID &ID) { 2775 Profile(ID, getKeyword(), NNS, Name); 2776 } 2777 2778 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2779 NestedNameSpecifier *NNS, NameType Name) { 2780 ID.AddInteger(Keyword); 2781 ID.AddPointer(NNS); 2782 ID.AddPointer(Name.getOpaqueValue()); 2783 } 2784 2785 static bool classof(const Type *T) { 2786 return T->getTypeClass() == DependentName; 2787 } 2788 static bool classof(const DependentNameType *T) { return true; } 2789}; 2790 2791/// ObjCObjectType - Represents a class type in Objective C. 2792/// Every Objective C type is a combination of a base type and a 2793/// list of protocols. 2794/// 2795/// Given the following declarations: 2796/// @class C; 2797/// @protocol P; 2798/// 2799/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 2800/// with base C and no protocols. 2801/// 2802/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 2803/// 2804/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 2805/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 2806/// and no protocols. 2807/// 2808/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 2809/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 2810/// this should get its own sugar class to better represent the source. 2811class ObjCObjectType : public Type { 2812 // Pad the bit count up so that NumProtocols is 2-byte aligned 2813 unsigned : BitsRemainingInType - 16; 2814 2815 /// \brief The number of protocols stored after the 2816 /// ObjCObjectPointerType node. 2817 /// 2818 /// These protocols are those written directly on the type. If 2819 /// protocol qualifiers ever become additive, the iterators will 2820 /// get kindof complicated. 2821 /// 2822 /// In the canonical object type, these are sorted alphabetically 2823 /// and uniqued. 2824 unsigned NumProtocols : 16; 2825 2826 /// Either a BuiltinType or an InterfaceType or sugar for either. 2827 QualType BaseType; 2828 2829 ObjCProtocolDecl * const *getProtocolStorage() const { 2830 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 2831 } 2832 2833 ObjCProtocolDecl **getProtocolStorage(); 2834 2835protected: 2836 ObjCObjectType(QualType Canonical, QualType Base, 2837 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 2838 2839 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 2840 ObjCObjectType(enum Nonce_ObjCInterface) 2841 : Type(ObjCInterface, QualType(), false), 2842 NumProtocols(0), 2843 BaseType(QualType(this_(), 0)) {} 2844 2845protected: 2846 Linkage getLinkageImpl() const; // key function 2847 2848public: 2849 /// getBaseType - Gets the base type of this object type. This is 2850 /// always (possibly sugar for) one of: 2851 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 2852 /// user, which is a typedef for an ObjCPointerType) 2853 /// - the 'Class' builtin type (same caveat) 2854 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 2855 QualType getBaseType() const { return BaseType; } 2856 2857 bool isObjCId() const { 2858 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 2859 } 2860 bool isObjCClass() const { 2861 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 2862 } 2863 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 2864 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 2865 bool isObjCUnqualifiedIdOrClass() const { 2866 if (!qual_empty()) return false; 2867 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 2868 return T->getKind() == BuiltinType::ObjCId || 2869 T->getKind() == BuiltinType::ObjCClass; 2870 return false; 2871 } 2872 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 2873 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 2874 2875 /// Gets the interface declaration for this object type, if the base type 2876 /// really is an interface. 2877 ObjCInterfaceDecl *getInterface() const; 2878 2879 typedef ObjCProtocolDecl * const *qual_iterator; 2880 2881 qual_iterator qual_begin() const { return getProtocolStorage(); } 2882 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 2883 2884 bool qual_empty() const { return getNumProtocols() == 0; } 2885 2886 /// getNumProtocols - Return the number of qualifying protocols in this 2887 /// interface type, or 0 if there are none. 2888 unsigned getNumProtocols() const { return NumProtocols; } 2889 2890 /// \brief Fetch a protocol by index. 2891 ObjCProtocolDecl *getProtocol(unsigned I) const { 2892 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2893 return qual_begin()[I]; 2894 } 2895 2896 bool isSugared() const { return false; } 2897 QualType desugar() const { return QualType(this, 0); } 2898 2899 static bool classof(const Type *T) { 2900 return T->getTypeClass() == ObjCObject || 2901 T->getTypeClass() == ObjCInterface; 2902 } 2903 static bool classof(const ObjCObjectType *) { return true; } 2904}; 2905 2906/// ObjCObjectTypeImpl - A class providing a concrete implementation 2907/// of ObjCObjectType, so as to not increase the footprint of 2908/// ObjCInterfaceType. Code outside of ASTContext and the core type 2909/// system should not reference this type. 2910class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 2911 friend class ASTContext; 2912 2913 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 2914 // will need to be modified. 2915 2916 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 2917 ObjCProtocolDecl * const *Protocols, 2918 unsigned NumProtocols) 2919 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 2920 2921public: 2922 void Destroy(ASTContext& C); // key function 2923 2924 void Profile(llvm::FoldingSetNodeID &ID); 2925 static void Profile(llvm::FoldingSetNodeID &ID, 2926 QualType Base, 2927 ObjCProtocolDecl *const *protocols, 2928 unsigned NumProtocols); 2929}; 2930 2931inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 2932 return reinterpret_cast<ObjCProtocolDecl**>( 2933 static_cast<ObjCObjectTypeImpl*>(this) + 1); 2934} 2935 2936/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2937/// object oriented design. They basically correspond to C++ classes. There 2938/// are two kinds of interface types, normal interfaces like "NSString" and 2939/// qualified interfaces, which are qualified with a protocol list like 2940/// "NSString<NSCopyable, NSAmazing>". 2941/// 2942/// ObjCInterfaceType guarantees the following properties when considered 2943/// as a subtype of its superclass, ObjCObjectType: 2944/// - There are no protocol qualifiers. To reinforce this, code which 2945/// tries to invoke the protocol methods via an ObjCInterfaceType will 2946/// fail to compile. 2947/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 2948/// T->getBaseType() == QualType(T, 0). 2949class ObjCInterfaceType : public ObjCObjectType { 2950 ObjCInterfaceDecl *Decl; 2951 2952 ObjCInterfaceType(const ObjCInterfaceDecl *D) 2953 : ObjCObjectType(Nonce_ObjCInterface), 2954 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 2955 friend class ASTContext; // ASTContext creates these. 2956public: 2957 void Destroy(ASTContext& C); // key function 2958 2959 /// getDecl - Get the declaration of this interface. 2960 ObjCInterfaceDecl *getDecl() const { return Decl; } 2961 2962 bool isSugared() const { return false; } 2963 QualType desugar() const { return QualType(this, 0); } 2964 2965 static bool classof(const Type *T) { 2966 return T->getTypeClass() == ObjCInterface; 2967 } 2968 static bool classof(const ObjCInterfaceType *) { return true; } 2969 2970 // Nonsense to "hide" certain members of ObjCObjectType within this 2971 // class. People asking for protocols on an ObjCInterfaceType are 2972 // not going to get what they want: ObjCInterfaceTypes are 2973 // guaranteed to have no protocols. 2974 enum { 2975 qual_iterator, 2976 qual_begin, 2977 qual_end, 2978 getNumProtocols, 2979 getProtocol 2980 }; 2981}; 2982 2983inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 2984 if (const ObjCInterfaceType *T = 2985 getBaseType()->getAs<ObjCInterfaceType>()) 2986 return T->getDecl(); 2987 return 0; 2988} 2989 2990/// ObjCObjectPointerType - Used to represent a pointer to an 2991/// Objective C object. These are constructed from pointer 2992/// declarators when the pointee type is an ObjCObjectType (or sugar 2993/// for one). In addition, the 'id' and 'Class' types are typedefs 2994/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 2995/// are translated into these. 2996/// 2997/// Pointers to pointers to Objective C objects are still PointerTypes; 2998/// only the first level of pointer gets it own type implementation. 2999class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3000 QualType PointeeType; 3001 3002 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3003 : Type(ObjCObjectPointer, Canonical, false), 3004 PointeeType(Pointee) {} 3005 friend class ASTContext; // ASTContext creates these. 3006 3007protected: 3008 virtual Linkage getLinkageImpl() const; 3009 3010public: 3011 void Destroy(ASTContext& C); 3012 3013 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3014 /// The result will always be an ObjCObjectType or sugar thereof. 3015 QualType getPointeeType() const { return PointeeType; } 3016 3017 /// getObjCObjectType - Gets the type pointed to by this ObjC 3018 /// pointer. This method always returns non-null. 3019 /// 3020 /// This method is equivalent to getPointeeType() except that 3021 /// it discards any typedefs (or other sugar) between this 3022 /// type and the "outermost" object type. So for: 3023 /// @class A; @protocol P; @protocol Q; 3024 /// typedef A<P> AP; 3025 /// typedef A A1; 3026 /// typedef A1<P> A1P; 3027 /// typedef A1P<Q> A1PQ; 3028 /// For 'A*', getObjectType() will return 'A'. 3029 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3030 /// For 'AP*', getObjectType() will return 'A<P>'. 3031 /// For 'A1*', getObjectType() will return 'A'. 3032 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3033 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3034 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3035 /// adding protocols to a protocol-qualified base discards the 3036 /// old qualifiers (for now). But if it didn't, getObjectType() 3037 /// would return 'A1P<Q>' (and we'd have to make iterating over 3038 /// qualifiers more complicated). 3039 const ObjCObjectType *getObjectType() const { 3040 return PointeeType->getAs<ObjCObjectType>(); 3041 } 3042 3043 /// getInterfaceType - If this pointer points to an Objective C 3044 /// @interface type, gets the type for that interface. Any protocol 3045 /// qualifiers on the interface are ignored. 3046 /// 3047 /// \return null if the base type for this pointer is 'id' or 'Class' 3048 const ObjCInterfaceType *getInterfaceType() const { 3049 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3050 } 3051 3052 /// getInterfaceDecl - If this pointer points to an Objective @interface 3053 /// type, gets the declaration for that interface. 3054 /// 3055 /// \return null if the base type for this pointer is 'id' or 'Class' 3056 ObjCInterfaceDecl *getInterfaceDecl() const { 3057 return getObjectType()->getInterface(); 3058 } 3059 3060 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3061 /// its object type is the primitive 'id' type with no protocols. 3062 bool isObjCIdType() const { 3063 return getObjectType()->isObjCUnqualifiedId(); 3064 } 3065 3066 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3067 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3068 bool isObjCClassType() const { 3069 return getObjectType()->isObjCUnqualifiedClass(); 3070 } 3071 3072 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3073 /// non-empty set of protocols. 3074 bool isObjCQualifiedIdType() const { 3075 return getObjectType()->isObjCQualifiedId(); 3076 } 3077 3078 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3079 /// some non-empty set of protocols. 3080 bool isObjCQualifiedClassType() const { 3081 return getObjectType()->isObjCQualifiedClass(); 3082 } 3083 3084 /// An iterator over the qualifiers on the object type. Provided 3085 /// for convenience. This will always iterate over the full set of 3086 /// protocols on a type, not just those provided directly. 3087 typedef ObjCObjectType::qual_iterator qual_iterator; 3088 3089 qual_iterator qual_begin() const { 3090 return getObjectType()->qual_begin(); 3091 } 3092 qual_iterator qual_end() const { 3093 return getObjectType()->qual_end(); 3094 } 3095 bool qual_empty() const { return getObjectType()->qual_empty(); } 3096 3097 /// getNumProtocols - Return the number of qualifying protocols on 3098 /// the object type. 3099 unsigned getNumProtocols() const { 3100 return getObjectType()->getNumProtocols(); 3101 } 3102 3103 /// \brief Retrieve a qualifying protocol by index on the object 3104 /// type. 3105 ObjCProtocolDecl *getProtocol(unsigned I) const { 3106 return getObjectType()->getProtocol(I); 3107 } 3108 3109 bool isSugared() const { return false; } 3110 QualType desugar() const { return QualType(this, 0); } 3111 3112 void Profile(llvm::FoldingSetNodeID &ID) { 3113 Profile(ID, getPointeeType()); 3114 } 3115 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3116 ID.AddPointer(T.getAsOpaquePtr()); 3117 } 3118 static bool classof(const Type *T) { 3119 return T->getTypeClass() == ObjCObjectPointer; 3120 } 3121 static bool classof(const ObjCObjectPointerType *) { return true; } 3122}; 3123 3124/// A qualifier set is used to build a set of qualifiers. 3125class QualifierCollector : public Qualifiers { 3126 ASTContext *Context; 3127 3128public: 3129 QualifierCollector(Qualifiers Qs = Qualifiers()) 3130 : Qualifiers(Qs), Context(0) {} 3131 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3132 : Qualifiers(Qs), Context(&Context) {} 3133 3134 void setContext(ASTContext &C) { Context = &C; } 3135 3136 /// Collect any qualifiers on the given type and return an 3137 /// unqualified type. 3138 const Type *strip(QualType QT) { 3139 addFastQualifiers(QT.getLocalFastQualifiers()); 3140 if (QT.hasLocalNonFastQualifiers()) { 3141 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3142 Context = &EQ->getContext(); 3143 addQualifiers(EQ->getQualifiers()); 3144 return EQ->getBaseType(); 3145 } 3146 return QT.getTypePtrUnsafe(); 3147 } 3148 3149 /// Apply the collected qualifiers to the given type. 3150 QualType apply(QualType QT) const; 3151 3152 /// Apply the collected qualifiers to the given type. 3153 QualType apply(const Type* T) const; 3154 3155}; 3156 3157 3158// Inline function definitions. 3159 3160inline bool QualType::isCanonical() const { 3161 const Type *T = getTypePtr(); 3162 if (hasLocalQualifiers()) 3163 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3164 return T->isCanonicalUnqualified(); 3165} 3166 3167inline bool QualType::isCanonicalAsParam() const { 3168 if (hasLocalQualifiers()) return false; 3169 const Type *T = getTypePtr(); 3170 return T->isCanonicalUnqualified() && 3171 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3172} 3173 3174inline bool QualType::isConstQualified() const { 3175 return isLocalConstQualified() || 3176 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3177} 3178 3179inline bool QualType::isRestrictQualified() const { 3180 return isLocalRestrictQualified() || 3181 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3182} 3183 3184 3185inline bool QualType::isVolatileQualified() const { 3186 return isLocalVolatileQualified() || 3187 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3188} 3189 3190inline bool QualType::hasQualifiers() const { 3191 return hasLocalQualifiers() || 3192 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3193} 3194 3195inline Qualifiers QualType::getQualifiers() const { 3196 Qualifiers Quals = getLocalQualifiers(); 3197 Quals.addQualifiers( 3198 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3199 return Quals; 3200} 3201 3202inline unsigned QualType::getCVRQualifiers() const { 3203 return getLocalCVRQualifiers() | 3204 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3205} 3206 3207/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3208/// type, returns them. Otherwise, if this is an array type, recurses 3209/// on the element type until some qualifiers have been found or a non-array 3210/// type reached. 3211inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3212 if (unsigned Quals = getCVRQualifiers()) 3213 return Quals; 3214 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3215 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3216 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3217 return 0; 3218} 3219 3220inline void QualType::removeConst() { 3221 removeFastQualifiers(Qualifiers::Const); 3222} 3223 3224inline void QualType::removeRestrict() { 3225 removeFastQualifiers(Qualifiers::Restrict); 3226} 3227 3228inline void QualType::removeVolatile() { 3229 QualifierCollector Qc; 3230 const Type *Ty = Qc.strip(*this); 3231 if (Qc.hasVolatile()) { 3232 Qc.removeVolatile(); 3233 *this = Qc.apply(Ty); 3234 } 3235} 3236 3237inline void QualType::removeCVRQualifiers(unsigned Mask) { 3238 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3239 3240 // Fast path: we don't need to touch the slow qualifiers. 3241 if (!(Mask & ~Qualifiers::FastMask)) { 3242 removeFastQualifiers(Mask); 3243 return; 3244 } 3245 3246 QualifierCollector Qc; 3247 const Type *Ty = Qc.strip(*this); 3248 Qc.removeCVRQualifiers(Mask); 3249 *this = Qc.apply(Ty); 3250} 3251 3252/// getAddressSpace - Return the address space of this type. 3253inline unsigned QualType::getAddressSpace() const { 3254 if (hasLocalNonFastQualifiers()) { 3255 const ExtQuals *EQ = getExtQualsUnsafe(); 3256 if (EQ->hasAddressSpace()) 3257 return EQ->getAddressSpace(); 3258 } 3259 3260 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3261 if (CT.hasLocalNonFastQualifiers()) { 3262 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3263 if (EQ->hasAddressSpace()) 3264 return EQ->getAddressSpace(); 3265 } 3266 3267 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3268 return AT->getElementType().getAddressSpace(); 3269 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3270 return RT->getAddressSpace(); 3271 return 0; 3272} 3273 3274/// getObjCGCAttr - Return the gc attribute of this type. 3275inline Qualifiers::GC QualType::getObjCGCAttr() const { 3276 if (hasLocalNonFastQualifiers()) { 3277 const ExtQuals *EQ = getExtQualsUnsafe(); 3278 if (EQ->hasObjCGCAttr()) 3279 return EQ->getObjCGCAttr(); 3280 } 3281 3282 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3283 if (CT.hasLocalNonFastQualifiers()) { 3284 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3285 if (EQ->hasObjCGCAttr()) 3286 return EQ->getObjCGCAttr(); 3287 } 3288 3289 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3290 return AT->getElementType().getObjCGCAttr(); 3291 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3292 return PT->getPointeeType().getObjCGCAttr(); 3293 // We most look at all pointer types, not just pointer to interface types. 3294 if (const PointerType *PT = CT->getAs<PointerType>()) 3295 return PT->getPointeeType().getObjCGCAttr(); 3296 return Qualifiers::GCNone; 3297} 3298 3299inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3300 if (const PointerType *PT = t.getAs<PointerType>()) { 3301 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3302 return FT->getExtInfo(); 3303 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3304 return FT->getExtInfo(); 3305 3306 return FunctionType::ExtInfo(); 3307} 3308 3309inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3310 return getFunctionExtInfo(*t); 3311} 3312 3313/// isMoreQualifiedThan - Determine whether this type is more 3314/// qualified than the Other type. For example, "const volatile int" 3315/// is more qualified than "const int", "volatile int", and 3316/// "int". However, it is not more qualified than "const volatile 3317/// int". 3318inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3319 // FIXME: work on arbitrary qualifiers 3320 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3321 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3322 if (getAddressSpace() != Other.getAddressSpace()) 3323 return false; 3324 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3325} 3326 3327/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3328/// as qualified as the Other type. For example, "const volatile 3329/// int" is at least as qualified as "const int", "volatile int", 3330/// "int", and "const volatile int". 3331inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3332 // FIXME: work on arbitrary qualifiers 3333 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3334 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3335 if (getAddressSpace() != Other.getAddressSpace()) 3336 return false; 3337 return (MyQuals | OtherQuals) == MyQuals; 3338} 3339 3340/// getNonReferenceType - If Type is a reference type (e.g., const 3341/// int&), returns the type that the reference refers to ("const 3342/// int"). Otherwise, returns the type itself. This routine is used 3343/// throughout Sema to implement C++ 5p6: 3344/// 3345/// If an expression initially has the type "reference to T" (8.3.2, 3346/// 8.5.3), the type is adjusted to "T" prior to any further 3347/// analysis, the expression designates the object or function 3348/// denoted by the reference, and the expression is an lvalue. 3349inline QualType QualType::getNonReferenceType() const { 3350 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3351 return RefType->getPointeeType(); 3352 else 3353 return *this; 3354} 3355 3356inline bool Type::isFunctionType() const { 3357 return isa<FunctionType>(CanonicalType); 3358} 3359inline bool Type::isPointerType() const { 3360 return isa<PointerType>(CanonicalType); 3361} 3362inline bool Type::isAnyPointerType() const { 3363 return isPointerType() || isObjCObjectPointerType(); 3364} 3365inline bool Type::isBlockPointerType() const { 3366 return isa<BlockPointerType>(CanonicalType); 3367} 3368inline bool Type::isReferenceType() const { 3369 return isa<ReferenceType>(CanonicalType); 3370} 3371inline bool Type::isLValueReferenceType() const { 3372 return isa<LValueReferenceType>(CanonicalType); 3373} 3374inline bool Type::isRValueReferenceType() const { 3375 return isa<RValueReferenceType>(CanonicalType); 3376} 3377inline bool Type::isFunctionPointerType() const { 3378 if (const PointerType* T = getAs<PointerType>()) 3379 return T->getPointeeType()->isFunctionType(); 3380 else 3381 return false; 3382} 3383inline bool Type::isMemberPointerType() const { 3384 return isa<MemberPointerType>(CanonicalType); 3385} 3386inline bool Type::isMemberFunctionPointerType() const { 3387 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3388 return T->getPointeeType()->isFunctionType(); 3389 else 3390 return false; 3391} 3392inline bool Type::isArrayType() const { 3393 return isa<ArrayType>(CanonicalType); 3394} 3395inline bool Type::isConstantArrayType() const { 3396 return isa<ConstantArrayType>(CanonicalType); 3397} 3398inline bool Type::isIncompleteArrayType() const { 3399 return isa<IncompleteArrayType>(CanonicalType); 3400} 3401inline bool Type::isVariableArrayType() const { 3402 return isa<VariableArrayType>(CanonicalType); 3403} 3404inline bool Type::isDependentSizedArrayType() const { 3405 return isa<DependentSizedArrayType>(CanonicalType); 3406} 3407inline bool Type::isRecordType() const { 3408 return isa<RecordType>(CanonicalType); 3409} 3410inline bool Type::isAnyComplexType() const { 3411 return isa<ComplexType>(CanonicalType); 3412} 3413inline bool Type::isVectorType() const { 3414 return isa<VectorType>(CanonicalType); 3415} 3416inline bool Type::isExtVectorType() const { 3417 return isa<ExtVectorType>(CanonicalType); 3418} 3419inline bool Type::isObjCObjectPointerType() const { 3420 return isa<ObjCObjectPointerType>(CanonicalType); 3421} 3422inline bool Type::isObjCObjectType() const { 3423 return isa<ObjCObjectType>(CanonicalType); 3424} 3425inline bool Type::isObjCQualifiedIdType() const { 3426 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3427 return OPT->isObjCQualifiedIdType(); 3428 return false; 3429} 3430inline bool Type::isObjCQualifiedClassType() const { 3431 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3432 return OPT->isObjCQualifiedClassType(); 3433 return false; 3434} 3435inline bool Type::isObjCIdType() const { 3436 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3437 return OPT->isObjCIdType(); 3438 return false; 3439} 3440inline bool Type::isObjCClassType() const { 3441 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3442 return OPT->isObjCClassType(); 3443 return false; 3444} 3445inline bool Type::isObjCSelType() const { 3446 if (const PointerType *OPT = getAs<PointerType>()) 3447 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3448 return false; 3449} 3450inline bool Type::isObjCBuiltinType() const { 3451 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3452} 3453inline bool Type::isTemplateTypeParmType() const { 3454 return isa<TemplateTypeParmType>(CanonicalType); 3455} 3456 3457inline bool Type::isSpecificBuiltinType(unsigned K) const { 3458 if (const BuiltinType *BT = getAs<BuiltinType>()) 3459 if (BT->getKind() == (BuiltinType::Kind) K) 3460 return true; 3461 return false; 3462} 3463 3464/// \brief Determines whether this is a type for which one can define 3465/// an overloaded operator. 3466inline bool Type::isOverloadableType() const { 3467 return isDependentType() || isRecordType() || isEnumeralType(); 3468} 3469 3470inline bool Type::hasPointerRepresentation() const { 3471 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3472 isObjCObjectPointerType() || isNullPtrType()); 3473} 3474 3475inline bool Type::hasObjCPointerRepresentation() const { 3476 return isObjCObjectPointerType(); 3477} 3478 3479/// Insertion operator for diagnostics. This allows sending QualType's into a 3480/// diagnostic with <<. 3481inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3482 QualType T) { 3483 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3484 Diagnostic::ak_qualtype); 3485 return DB; 3486} 3487 3488/// Insertion operator for partial diagnostics. This allows sending QualType's 3489/// into a diagnostic with <<. 3490inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3491 QualType T) { 3492 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3493 Diagnostic::ak_qualtype); 3494 return PD; 3495} 3496 3497// Helper class template that is used by Type::getAs to ensure that one does 3498// not try to look through a qualified type to get to an array type. 3499template<typename T, 3500 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3501 llvm::is_base_of<ArrayType, T>::value)> 3502struct ArrayType_cannot_be_used_with_getAs { }; 3503 3504template<typename T> 3505struct ArrayType_cannot_be_used_with_getAs<T, true>; 3506 3507/// Member-template getAs<specific type>'. 3508template <typename T> const T *Type::getAs() const { 3509 ArrayType_cannot_be_used_with_getAs<T> at; 3510 (void)at; 3511 3512 // If this is directly a T type, return it. 3513 if (const T *Ty = dyn_cast<T>(this)) 3514 return Ty; 3515 3516 // If the canonical form of this type isn't the right kind, reject it. 3517 if (!isa<T>(CanonicalType)) 3518 return 0; 3519 3520 // If this is a typedef for the type, strip the typedef off without 3521 // losing all typedef information. 3522 return cast<T>(getUnqualifiedDesugaredType()); 3523} 3524 3525} // end namespace clang 3526 3527#endif 3528